Home / 13,421.88-20,132.28-4,658.76

Finding the Fourth Proportional to 13,421.88, 20,132.28 and 4,658.76

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Solution

The fourth proportional to 13,421.88, 20,132.28 and 4,658.76 is: 6,987.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.88 : 20,132.28 = 4,658.76 : x
  2. Step 2: Convert to fraction form
    13,421.88/20,132.28 = 4,658.76/x
  3. Step 3: Cross multiply
    13,421.88x = 20,132.28 × 4,658.76
  4. Step 4: Simplify right side
    13,421.88x = 93,791,460.77
  5. Step 5: Solve for x
    x = 93,791,460.77/13,421.88
  6. Step 6: Final answer
    x = 6,987.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.