Home / 25,685.20-38,518.20-17,870.80

Finding the Fourth Proportional to 25,685.20, 38,518.20 and 17,870.80

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Solution

The fourth proportional to 25,685.20, 38,518.20 and 17,870.80 is: 26,799.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,685.20 : 38,518.20 = 17,870.80 : x
  2. Step 2: Convert to fraction form
    25,685.20/38,518.20 = 17,870.80/x
  3. Step 3: Cross multiply
    25,685.20x = 38,518.20 × 17,870.80
  4. Step 4: Simplify right side
    25,685.20x = 688,351,048.56
  5. Step 5: Solve for x
    x = 688,351,048.56/25,685.20
  6. Step 6: Final answer
    x = 26,799.52

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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.