Home / 28,545.40-42,866.70-21,158.20

Finding the Fourth Proportional to 28,545.40, 42,866.70 and 21,158.20

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Solution

The fourth proportional to 28,545.40, 42,866.70 and 21,158.20 is: 31,773.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,545.40 : 42,866.70 = 21,158.20 : x
  2. Step 2: Convert to fraction form
    28,545.40/42,866.70 = 21,158.20/x
  3. Step 3: Cross multiply
    28,545.40x = 42,866.70 × 21,158.20
  4. Step 4: Simplify right side
    28,545.40x = 906,982,211.94
  5. Step 5: Solve for x
    x = 906,982,211.94/28,545.40
  6. Step 6: Final answer
    x = 31,773.32

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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.