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Finding the Fourth Proportional to 9,972.36, 15,017.91 and 8,689.32

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Solution

The fourth proportional to 9,972.36, 15,017.91 and 8,689.32 is: 13,085.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,972.36 : 15,017.91 = 8,689.32 : x
  2. Step 2: Convert to fraction form
    9,972.36/15,017.91 = 8,689.32/x
  3. Step 3: Cross multiply
    9,972.36x = 15,017.91 × 8,689.32
  4. Step 4: Simplify right side
    9,972.36x = 130,495,425.72
  5. Step 5: Solve for x
    x = 130,495,425.72/9,972.36
  6. Step 6: Final answer
    x = 13,085.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.