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Finding the Fourth Proportional to 14,688.48, 20,264.88 and 8,721.12

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Solution

The fourth proportional to 14,688.48, 20,264.88 and 8,721.12 is: 12,032.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,688.48 : 20,264.88 = 8,721.12 : x
  2. Step 2: Convert to fraction form
    14,688.48/20,264.88 = 8,721.12/x
  3. Step 3: Cross multiply
    14,688.48x = 20,264.88 × 8,721.12
  4. Step 4: Simplify right side
    14,688.48x = 176,732,450.27
  5. Step 5: Solve for x
    x = 176,732,450.27/14,688.48
  6. Step 6: Final answer
    x = 12,032.04

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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.