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Finding the Fourth Proportional to 31,486.76, 47,219.01 and 9,294.20

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Solution

The fourth proportional to 31,486.76, 47,219.01 and 9,294.20 is: 13,938.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,486.76 : 47,219.01 = 9,294.20 : x
  2. Step 2: Convert to fraction form
    31,486.76/47,219.01 = 9,294.20/x
  3. Step 3: Cross multiply
    31,486.76x = 47,219.01 × 9,294.20
  4. Step 4: Simplify right side
    31,486.76x = 438,862,922.74
  5. Step 5: Solve for x
    x = 438,862,922.74/31,486.76
  6. Step 6: Final answer
    x = 13,938.01

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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.