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Finding the Fourth Proportional to 28,712.40, 42,971.40 and 25,213.20

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Solution

The fourth proportional to 28,712.40, 42,971.40 and 25,213.20 is: 37,734.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.40 : 42,971.40 = 25,213.20 : x
  2. Step 2: Convert to fraction form
    28,712.40/42,971.40 = 25,213.20/x
  3. Step 3: Cross multiply
    28,712.40x = 42,971.40 × 25,213.20
  4. Step 4: Simplify right side
    28,712.40x = 1,083,446,502.48
  5. Step 5: Solve for x
    x = 1,083,446,502.48/28,712.40
  6. Step 6: Final answer
    x = 37,734.45

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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.