Home / 20,482.40-28,249.53-13,407.46

Finding the Fourth Proportional to 20,482.40, 28,249.53 and 13,407.46

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Solution

The fourth proportional to 20,482.40, 28,249.53 and 13,407.46 is: 18,491.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.40 : 28,249.53 = 13,407.46 : x
  2. Step 2: Convert to fraction form
    20,482.40/28,249.53 = 13,407.46/x
  3. Step 3: Cross multiply
    20,482.40x = 28,249.53 × 13,407.46
  4. Step 4: Simplify right side
    20,482.40x = 378,754,444.30
  5. Step 5: Solve for x
    x = 378,754,444.30/20,482.40
  6. Step 6: Final answer
    x = 18,491.70

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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.