Home / 39,420.29-54,445.25-28,712.87

Finding the Fourth Proportional to 39,420.29, 54,445.25 and 28,712.87

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Solution

The fourth proportional to 39,420.29, 54,445.25 and 28,712.87 is: 39,656.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,420.29 : 54,445.25 = 28,712.87 : x
  2. Step 2: Convert to fraction form
    39,420.29/54,445.25 = 28,712.87/x
  3. Step 3: Cross multiply
    39,420.29x = 54,445.25 × 28,712.87
  4. Step 4: Simplify right side
    39,420.29x = 1,563,279,385.37
  5. Step 5: Solve for x
    x = 1,563,279,385.37/39,420.29
  6. Step 6: Final answer
    x = 39,656.72

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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.