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Finding the Fourth Proportional to 19,007.80, 28,479.30 and 16,221.40

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Solution

The fourth proportional to 19,007.80, 28,479.30 and 16,221.40 is: 24,304.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.80 : 28,479.30 = 16,221.40 : x
  2. Step 2: Convert to fraction form
    19,007.80/28,479.30 = 16,221.40/x
  3. Step 3: Cross multiply
    19,007.80x = 28,479.30 × 16,221.40
  4. Step 4: Simplify right side
    19,007.80x = 461,974,117.02
  5. Step 5: Solve for x
    x = 461,974,117.02/19,007.80
  6. Step 6: Final answer
    x = 24,304.45

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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.