Home / 19,657.40-29,428.19-12,981.65

Finding the Fourth Proportional to 19,657.40, 29,428.19 and 12,981.65

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Solution

The fourth proportional to 19,657.40, 29,428.19 and 12,981.65 is: 19,434.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,657.40 : 29,428.19 = 12,981.65 : x
  2. Step 2: Convert to fraction form
    19,657.40/29,428.19 = 12,981.65/x
  3. Step 3: Cross multiply
    19,657.40x = 29,428.19 × 12,981.65
  4. Step 4: Simplify right side
    19,657.40x = 382,026,397.81
  5. Step 5: Solve for x
    x = 382,026,397.81/19,657.40
  6. Step 6: Final answer
    x = 19,434.23

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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.