Home / 28,776.38-39,722.55-22,490.78

Finding the Fourth Proportional to 28,776.38, 39,722.55 and 22,490.78

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Solution

The fourth proportional to 28,776.38, 39,722.55 and 22,490.78 is: 31,045.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,776.38 : 39,722.55 = 22,490.78 : x
  2. Step 2: Convert to fraction form
    28,776.38/39,722.55 = 22,490.78/x
  3. Step 3: Cross multiply
    28,776.38x = 39,722.55 × 22,490.78
  4. Step 4: Simplify right side
    28,776.38x = 893,391,133.09
  5. Step 5: Solve for x
    x = 893,391,133.09/28,776.38
  6. Step 6: Final answer
    x = 31,045.99

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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.