Home / 15,501.70-21,392.40-8,428.11

Finding the Fourth Proportional to 15,501.70, 21,392.40 and 8,428.11

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Solution

The fourth proportional to 15,501.70, 21,392.40 and 8,428.11 is: 11,630.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.70 : 21,392.40 = 8,428.11 : x
  2. Step 2: Convert to fraction form
    15,501.70/21,392.40 = 8,428.11/x
  3. Step 3: Cross multiply
    15,501.70x = 21,392.40 × 8,428.11
  4. Step 4: Simplify right side
    15,501.70x = 180,297,500.36
  5. Step 5: Solve for x
    x = 180,297,500.36/15,501.70
  6. Step 6: Final answer
    x = 11,630.82

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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.