Home / 28,123.40-38,807.22-15,545.72

Finding the Fourth Proportional to 28,123.40, 38,807.22 and 15,545.72

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Solution

The fourth proportional to 28,123.40, 38,807.22 and 15,545.72 is: 21,451.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,123.40 : 38,807.22 = 15,545.72 : x
  2. Step 2: Convert to fraction form
    28,123.40/38,807.22 = 15,545.72/x
  3. Step 3: Cross multiply
    28,123.40x = 38,807.22 × 15,545.72
  4. Step 4: Simplify right side
    28,123.40x = 603,286,176.10
  5. Step 5: Solve for x
    x = 603,286,176.10/28,123.40
  6. Step 6: Final answer
    x = 21,451.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.