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Finding the Fourth Proportional to 19,320.80, 28,981.20 and 17,376.80

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Solution

The fourth proportional to 19,320.80, 28,981.20 and 17,376.80 is: 26,065.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,320.80 : 28,981.20 = 17,376.80 : x
  2. Step 2: Convert to fraction form
    19,320.80/28,981.20 = 17,376.80/x
  3. Step 3: Cross multiply
    19,320.80x = 28,981.20 × 17,376.80
  4. Step 4: Simplify right side
    19,320.80x = 503,600,516.16
  5. Step 5: Solve for x
    x = 503,600,516.16/19,320.80
  6. Step 6: Final answer
    x = 26,065.20

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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.