Home / 21,680.10-29,916.27-13,612.50

Finding the Fourth Proportional to 21,680.10, 29,916.27 and 13,612.50

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Solution

The fourth proportional to 21,680.10, 29,916.27 and 13,612.50 is: 18,783.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.10 : 29,916.27 = 13,612.50 : x
  2. Step 2: Convert to fraction form
    21,680.10/29,916.27 = 13,612.50/x
  3. Step 3: Cross multiply
    21,680.10x = 29,916.27 × 13,612.50
  4. Step 4: Simplify right side
    21,680.10x = 407,235,225.38
  5. Step 5: Solve for x
    x = 407,235,225.38/21,680.10
  6. Step 6: Final answer
    x = 18,783.83

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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.