Home / 15,378.66-21,084.12-15,098.40

Finding the Fourth Proportional to 15,378.66, 21,084.12 and 15,098.40

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Solution

The fourth proportional to 15,378.66, 21,084.12 and 15,098.40 is: 20,699.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.66 : 21,084.12 = 15,098.40 : x
  2. Step 2: Convert to fraction form
    15,378.66/21,084.12 = 15,098.40/x
  3. Step 3: Cross multiply
    15,378.66x = 21,084.12 × 15,098.40
  4. Step 4: Simplify right side
    15,378.66x = 318,336,477.41
  5. Step 5: Solve for x
    x = 318,336,477.41/15,378.66
  6. Step 6: Final answer
    x = 20,699.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.