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Finding the Fourth Proportional to 28,510.80, 42,685.20 and 26,959.20

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Solution

The fourth proportional to 28,510.80, 42,685.20 and 26,959.20 is: 40,362.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.80 : 42,685.20 = 26,959.20 : x
  2. Step 2: Convert to fraction form
    28,510.80/42,685.20 = 26,959.20/x
  3. Step 3: Cross multiply
    28,510.80x = 42,685.20 × 26,959.20
  4. Step 4: Simplify right side
    28,510.80x = 1,150,758,843.84
  5. Step 5: Solve for x
    x = 1,150,758,843.84/28,510.80
  6. Step 6: Final answer
    x = 40,362.21

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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.