Home / 15,134.16-20,885.22-8,420.52

Finding the Fourth Proportional to 15,134.16, 20,885.22 and 8,420.52

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Solution

The fourth proportional to 15,134.16, 20,885.22 and 8,420.52 is: 11,620.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.16 : 20,885.22 = 8,420.52 : x
  2. Step 2: Convert to fraction form
    15,134.16/20,885.22 = 8,420.52/x
  3. Step 3: Cross multiply
    15,134.16x = 20,885.22 × 8,420.52
  4. Step 4: Simplify right side
    15,134.16x = 175,864,412.71
  5. Step 5: Solve for x
    x = 175,864,412.71/15,134.16
  6. Step 6: Final answer
    x = 11,620.36

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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.