Home / 15,615.79-21,549.61-8,542.13

Finding the Fourth Proportional to 15,615.79, 21,549.61 and 8,542.13

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Solution

The fourth proportional to 15,615.79, 21,549.61 and 8,542.13 is: 11,788.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.79 : 21,549.61 = 8,542.13 : x
  2. Step 2: Convert to fraction form
    15,615.79/21,549.61 = 8,542.13/x
  3. Step 3: Cross multiply
    15,615.79x = 21,549.61 × 8,542.13
  4. Step 4: Simplify right side
    15,615.79x = 184,079,473.00
  5. Step 5: Solve for x
    x = 184,079,473.00/15,615.79
  6. Step 6: Final answer
    x = 11,788.04

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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.