Home / 19,988.16-30,000.80-10,134.40

Finding the Fourth Proportional to 19,988.16, 30,000.80 and 10,134.40

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Solution

The fourth proportional to 19,988.16, 30,000.80 and 10,134.40 is: 15,211.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988.16 : 30,000.80 = 10,134.40 : x
  2. Step 2: Convert to fraction form
    19,988.16/30,000.80 = 10,134.40/x
  3. Step 3: Cross multiply
    19,988.16x = 30,000.80 × 10,134.40
  4. Step 4: Simplify right side
    19,988.16x = 304,040,107.52
  5. Step 5: Solve for x
    x = 304,040,107.52/19,988.16
  6. Step 6: Final answer
    x = 15,211.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.