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Finding the Fourth Proportional to 15,320.70, 22,981.05 and 12,728.70

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Solution

The fourth proportional to 15,320.70, 22,981.05 and 12,728.70 is: 19,093.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.70 : 22,981.05 = 12,728.70 : x
  2. Step 2: Convert to fraction form
    15,320.70/22,981.05 = 12,728.70/x
  3. Step 3: Cross multiply
    15,320.70x = 22,981.05 × 12,728.70
  4. Step 4: Simplify right side
    15,320.70x = 292,518,891.14
  5. Step 5: Solve for x
    x = 292,518,891.14/15,320.70
  6. Step 6: Final answer
    x = 19,093.05

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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.