Home / 18,378.40-25,360.08-10,419.04

Finding the Fourth Proportional to 18,378.40, 25,360.08 and 10,419.04

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Solution

The fourth proportional to 18,378.40, 25,360.08 and 10,419.04 is: 14,377.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.40 : 25,360.08 = 10,419.04 : x
  2. Step 2: Convert to fraction form
    18,378.40/25,360.08 = 10,419.04/x
  3. Step 3: Cross multiply
    18,378.40x = 25,360.08 × 10,419.04
  4. Step 4: Simplify right side
    18,378.40x = 264,227,687.92
  5. Step 5: Solve for x
    x = 264,227,687.92/18,378.40
  6. Step 6: Final answer
    x = 14,377.08

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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.