Home / 12,989.19-17,925.12-8,217.67

Finding the Fourth Proportional to 12,989.19, 17,925.12 and 8,217.67

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Solution

The fourth proportional to 12,989.19, 17,925.12 and 8,217.67 is: 11,340.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.19 : 17,925.12 = 8,217.67 : x
  2. Step 2: Convert to fraction form
    12,989.19/17,925.12 = 8,217.67/x
  3. Step 3: Cross multiply
    12,989.19x = 17,925.12 × 8,217.67
  4. Step 4: Simplify right side
    12,989.19x = 147,302,590.16
  5. Step 5: Solve for x
    x = 147,302,590.16/12,989.19
  6. Step 6: Final answer
    x = 11,340.40

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.