Home / 12,400.72-17,115-9,572.20

Finding the Fourth Proportional to 12,400.72, 17,115 and 9,572.20

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Solution

The fourth proportional to 12,400.72, 17,115 and 9,572.20 is: 13,211.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.72 : 17,115 = 9,572.20 : x
  2. Step 2: Convert to fraction form
    12,400.72/17,115 = 9,572.20/x
  3. Step 3: Cross multiply
    12,400.72x = 17,115 × 9,572.20
  4. Step 4: Simplify right side
    12,400.72x = 163,828,203
  5. Step 5: Solve for x
    x = 163,828,203/12,400.72
  6. Step 6: Final answer
    x = 13,211.18

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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.