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Finding the Fourth Proportional to 8,659.02, 12,920.55 and 8,130.02

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Solution

The fourth proportional to 8,659.02, 12,920.55 and 8,130.02 is: 12,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.02 : 12,920.55 = 8,130.02 : x
  2. Step 2: Convert to fraction form
    8,659.02/12,920.55 = 8,130.02/x
  3. Step 3: Cross multiply
    8,659.02x = 12,920.55 × 8,130.02
  4. Step 4: Simplify right side
    8,659.02x = 105,044,265.31
  5. Step 5: Solve for x
    x = 105,044,265.31/8,659.02
  6. Step 6: Final answer
    x = 12,131.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.