Home / 12,688.16-17,508.28-7,383.20

Finding the Fourth Proportional to 12,688.16, 17,508.28 and 7,383.20

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Solution

The fourth proportional to 12,688.16, 17,508.28 and 7,383.20 is: 10,188.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.16 : 17,508.28 = 7,383.20 : x
  2. Step 2: Convert to fraction form
    12,688.16/17,508.28 = 7,383.20/x
  3. Step 3: Cross multiply
    12,688.16x = 17,508.28 × 7,383.20
  4. Step 4: Simplify right side
    12,688.16x = 129,267,132.90
  5. Step 5: Solve for x
    x = 129,267,132.90/12,688.16
  6. Step 6: Final answer
    x = 10,188.01

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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.