Home / 13,615.46-18,781.17-8,570.91

Finding the Fourth Proportional to 13,615.46, 18,781.17 and 8,570.91

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Solution

The fourth proportional to 13,615.46, 18,781.17 and 8,570.91 is: 11,822.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.46 : 18,781.17 = 8,570.91 : x
  2. Step 2: Convert to fraction form
    13,615.46/18,781.17 = 8,570.91/x
  3. Step 3: Cross multiply
    13,615.46x = 18,781.17 × 8,570.91
  4. Step 4: Simplify right side
    13,615.46x = 160,971,717.76
  5. Step 5: Solve for x
    x = 160,971,717.76/13,615.46
  6. Step 6: Final answer
    x = 11,822.72

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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.