Home / 28,657.38-42,988.81-11,128.58

Finding the Fourth Proportional to 28,657.38, 42,988.81 and 11,128.58

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Solution

The fourth proportional to 28,657.38, 42,988.81 and 11,128.58 is: 16,693.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.38 : 42,988.81 = 11,128.58 : x
  2. Step 2: Convert to fraction form
    28,657.38/42,988.81 = 11,128.58/x
  3. Step 3: Cross multiply
    28,657.38x = 42,988.81 × 11,128.58
  4. Step 4: Simplify right side
    28,657.38x = 478,404,411.19
  5. Step 5: Solve for x
    x = 478,404,411.19/28,657.38
  6. Step 6: Final answer
    x = 16,693.93

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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.