Home / 8,666.88-11,963.40-5,130.12

Finding the Fourth Proportional to 8,666.88, 11,963.40 and 5,130.12

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Solution

The fourth proportional to 8,666.88, 11,963.40 and 5,130.12 is: 7,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.88 : 11,963.40 = 5,130.12 : x
  2. Step 2: Convert to fraction form
    8,666.88/11,963.40 = 5,130.12/x
  3. Step 3: Cross multiply
    8,666.88x = 11,963.40 × 5,130.12
  4. Step 4: Simplify right side
    8,666.88x = 61,373,677.61
  5. Step 5: Solve for x
    x = 61,373,677.61/8,666.88
  6. Step 6: Final answer
    x = 7,081.40

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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.