Home / 28,516.29-42,781.71-11,870.79

Finding the Fourth Proportional to 28,516.29, 42,781.71 and 11,870.79

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Solution

The fourth proportional to 28,516.29, 42,781.71 and 11,870.79 is: 17,809.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,516.29 : 42,781.71 = 11,870.79 : x
  2. Step 2: Convert to fraction form
    28,516.29/42,781.71 = 11,870.79/x
  3. Step 3: Cross multiply
    28,516.29x = 42,781.71 × 11,870.79
  4. Step 4: Simplify right side
    28,516.29x = 507,852,695.25
  5. Step 5: Solve for x
    x = 507,852,695.25/28,516.29
  6. Step 6: Final answer
    x = 17,809.21

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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.