Home / 28,013.72-42,008.70-10,471.28

Finding the Fourth Proportional to 28,013.72, 42,008.70 and 10,471.28

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Solution

The fourth proportional to 28,013.72, 42,008.70 and 10,471.28 is: 15,702.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.72 : 42,008.70 = 10,471.28 : x
  2. Step 2: Convert to fraction form
    28,013.72/42,008.70 = 10,471.28/x
  3. Step 3: Cross multiply
    28,013.72x = 42,008.70 × 10,471.28
  4. Step 4: Simplify right side
    28,013.72x = 439,884,860.14
  5. Step 5: Solve for x
    x = 439,884,860.14/28,013.72
  6. Step 6: Final answer
    x = 15,702.48

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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.