Home / 20,320.64-28,041.84-11,368.30

Finding the Fourth Proportional to 20,320.64, 28,041.84 and 11,368.30

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Solution

The fourth proportional to 20,320.64, 28,041.84 and 11,368.30 is: 15,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.64 : 28,041.84 = 11,368.30 : x
  2. Step 2: Convert to fraction form
    20,320.64/28,041.84 = 11,368.30/x
  3. Step 3: Cross multiply
    20,320.64x = 28,041.84 × 11,368.30
  4. Step 4: Simplify right side
    20,320.64x = 318,788,049.67
  5. Step 5: Solve for x
    x = 318,788,049.67/20,320.64
  6. Step 6: Final answer
    x = 15,687.89

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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.