Home / 20,643.16-28,488.12-12,145.84

Finding the Fourth Proportional to 20,643.16, 28,488.12 and 12,145.84

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Solution

The fourth proportional to 20,643.16, 28,488.12 and 12,145.84 is: 16,761.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.16 : 28,488.12 = 12,145.84 : x
  2. Step 2: Convert to fraction form
    20,643.16/28,488.12 = 12,145.84/x
  3. Step 3: Cross multiply
    20,643.16x = 28,488.12 × 12,145.84
  4. Step 4: Simplify right side
    20,643.16x = 346,012,147.42
  5. Step 5: Solve for x
    x = 346,012,147.42/20,643.16
  6. Step 6: Final answer
    x = 16,761.59

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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.