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Finding the Fourth Proportional to 25,696.80, 38,545.20 and 15,328.80

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Solution

The fourth proportional to 25,696.80, 38,545.20 and 15,328.80 is: 22,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,696.80 : 38,545.20 = 15,328.80 : x
  2. Step 2: Convert to fraction form
    25,696.80/38,545.20 = 15,328.80/x
  3. Step 3: Cross multiply
    25,696.80x = 38,545.20 × 15,328.80
  4. Step 4: Simplify right side
    25,696.80x = 590,851,661.76
  5. Step 5: Solve for x
    x = 590,851,661.76/25,696.80
  6. Step 6: Final answer
    x = 22,993.20

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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.