Home / 19,888.20-29,789.10-10,643.40

Finding the Fourth Proportional to 19,888.20, 29,789.10 and 10,643.40

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Solution

The fourth proportional to 19,888.20, 29,789.10 and 10,643.40 is: 15,941.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888.20 : 29,789.10 = 10,643.40 : x
  2. Step 2: Convert to fraction form
    19,888.20/29,789.10 = 10,643.40/x
  3. Step 3: Cross multiply
    19,888.20x = 29,789.10 × 10,643.40
  4. Step 4: Simplify right side
    19,888.20x = 317,057,306.94
  5. Step 5: Solve for x
    x = 317,057,306.94/19,888.20
  6. Step 6: Final answer
    x = 15,941.98

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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.