Home / 31,438.62-43,389.54-28,781.28

Finding the Fourth Proportional to 31,438.62, 43,389.54 and 28,781.28

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Solution

The fourth proportional to 31,438.62, 43,389.54 and 28,781.28 is: 39,722.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.62 : 43,389.54 = 28,781.28 : x
  2. Step 2: Convert to fraction form
    31,438.62/43,389.54 = 28,781.28/x
  3. Step 3: Cross multiply
    31,438.62x = 43,389.54 × 28,781.28
  4. Step 4: Simplify right side
    31,438.62x = 1,248,806,499.81
  5. Step 5: Solve for x
    x = 1,248,806,499.81/31,438.62
  6. Step 6: Final answer
    x = 39,722.05

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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.