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Finding the Fourth Proportional to 19,242.80, 28,864.20 and 10,948.40

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Solution

The fourth proportional to 19,242.80, 28,864.20 and 10,948.40 is: 16,422.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,242.80 : 28,864.20 = 10,948.40 : x
  2. Step 2: Convert to fraction form
    19,242.80/28,864.20 = 10,948.40/x
  3. Step 3: Cross multiply
    19,242.80x = 28,864.20 × 10,948.40
  4. Step 4: Simplify right side
    19,242.80x = 316,016,807.28
  5. Step 5: Solve for x
    x = 316,016,807.28/19,242.80
  6. Step 6: Final answer
    x = 16,422.60

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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.