Home / 13,637.90-18,820.55-7,972.86

Finding the Fourth Proportional to 13,637.90, 18,820.55 and 7,972.86

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Solution

The fourth proportional to 13,637.90, 18,820.55 and 7,972.86 is: 11,002.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,637.90 : 18,820.55 = 7,972.86 : x
  2. Step 2: Convert to fraction form
    13,637.90/18,820.55 = 7,972.86/x
  3. Step 3: Cross multiply
    13,637.90x = 18,820.55 × 7,972.86
  4. Step 4: Simplify right side
    13,637.90x = 150,053,700.78
  5. Step 5: Solve for x
    x = 150,053,700.78/13,637.90
  6. Step 6: Final answer
    x = 11,002.70

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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.