Home / 12,402.64-17,109.96-7,925.20

Finding the Fourth Proportional to 12,402.64, 17,109.96 and 7,925.20

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Solution

The fourth proportional to 12,402.64, 17,109.96 and 7,925.20 is: 10,933.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402.64 : 17,109.96 = 7,925.20 : x
  2. Step 2: Convert to fraction form
    12,402.64/17,109.96 = 7,925.20/x
  3. Step 3: Cross multiply
    12,402.64x = 17,109.96 × 7,925.20
  4. Step 4: Simplify right side
    12,402.64x = 135,599,854.99
  5. Step 5: Solve for x
    x = 135,599,854.99/12,402.64
  6. Step 6: Final answer
    x = 10,933.14

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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.