Home / 28,129.69-42,066.55-21,018.97

Finding the Fourth Proportional to 28,129.69, 42,066.55 and 21,018.97

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Solution

The fourth proportional to 28,129.69, 42,066.55 and 21,018.97 is: 31,432.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.69 : 42,066.55 = 21,018.97 : x
  2. Step 2: Convert to fraction form
    28,129.69/42,066.55 = 21,018.97/x
  3. Step 3: Cross multiply
    28,129.69x = 42,066.55 × 21,018.97
  4. Step 4: Simplify right side
    28,129.69x = 884,195,552.45
  5. Step 5: Solve for x
    x = 884,195,552.45/28,129.69
  6. Step 6: Final answer
    x = 31,432.82

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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.