Home / 12,339.90-18,509.85-8,840.70

Finding the Fourth Proportional to 12,339.90, 18,509.85 and 8,840.70

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Solution

The fourth proportional to 12,339.90, 18,509.85 and 8,840.70 is: 13,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.90 : 18,509.85 = 8,840.70 : x
  2. Step 2: Convert to fraction form
    12,339.90/18,509.85 = 8,840.70/x
  3. Step 3: Cross multiply
    12,339.90x = 18,509.85 × 8,840.70
  4. Step 4: Simplify right side
    12,339.90x = 163,640,030.90
  5. Step 5: Solve for x
    x = 163,640,030.90/12,339.90
  6. Step 6: Final answer
    x = 13,261.05

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.