Home / 13,690.40-20,538.12-4,332.77

Finding the Fourth Proportional to 13,690.40, 20,538.12 and 4,332.77

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Solution

The fourth proportional to 13,690.40, 20,538.12 and 4,332.77 is: 6,499.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.40 : 20,538.12 = 4,332.77 : x
  2. Step 2: Convert to fraction form
    13,690.40/20,538.12 = 4,332.77/x
  3. Step 3: Cross multiply
    13,690.40x = 20,538.12 × 4,332.77
  4. Step 4: Simplify right side
    13,690.40x = 88,986,847.50
  5. Step 5: Solve for x
    x = 88,986,847.50/13,690.40
  6. Step 6: Final answer
    x = 6,499.95

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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.