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Finding the Fourth Proportional to 9,129.88, 12,599.21 and 4,938.13

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Solution

The fourth proportional to 9,129.88, 12,599.21 and 4,938.13 is: 6,814.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.88 : 12,599.21 = 4,938.13 : x
  2. Step 2: Convert to fraction form
    9,129.88/12,599.21 = 4,938.13/x
  3. Step 3: Cross multiply
    9,129.88x = 12,599.21 × 4,938.13
  4. Step 4: Simplify right side
    9,129.88x = 62,216,449.19
  5. Step 5: Solve for x
    x = 62,216,449.19/9,129.88
  6. Step 6: Final answer
    x = 6,814.60

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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.