Home / 21,728.40-29,980.17-14,545.32

Finding the Fourth Proportional to 21,728.40, 29,980.17 and 14,545.32

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Solution

The fourth proportional to 21,728.40, 29,980.17 and 14,545.32 is: 20,069.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.40 : 29,980.17 = 14,545.32 : x
  2. Step 2: Convert to fraction form
    21,728.40/29,980.17 = 14,545.32/x
  3. Step 3: Cross multiply
    21,728.40x = 29,980.17 × 14,545.32
  4. Step 4: Simplify right side
    21,728.40x = 436,071,166.30
  5. Step 5: Solve for x
    x = 436,071,166.30/21,728.40
  6. Step 6: Final answer
    x = 20,069.18

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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.