Home / 20,419.56-28,178.28-12,475.08

Finding the Fourth Proportional to 20,419.56, 28,178.28 and 12,475.08

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Solution

The fourth proportional to 20,419.56, 28,178.28 and 12,475.08 is: 17,215.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.56 : 28,178.28 = 12,475.08 : x
  2. Step 2: Convert to fraction form
    20,419.56/28,178.28 = 12,475.08/x
  3. Step 3: Cross multiply
    20,419.56x = 28,178.28 × 12,475.08
  4. Step 4: Simplify right side
    20,419.56x = 351,526,297.26
  5. Step 5: Solve for x
    x = 351,526,297.26/20,419.56
  6. Step 6: Final answer
    x = 17,215.17

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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.