Home / 20,547.60-30,821.40-5,757

Finding the Fourth Proportional to 20,547.60, 30,821.40 and 5,757

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Solution

The fourth proportional to 20,547.60, 30,821.40 and 5,757 is: 8,635.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.60 : 30,821.40 = 5,757 : x
  2. Step 2: Convert to fraction form
    20,547.60/30,821.40 = 5,757/x
  3. Step 3: Cross multiply
    20,547.60x = 30,821.40 × 5,757
  4. Step 4: Simplify right side
    20,547.60x = 177,438,799.80
  5. Step 5: Solve for x
    x = 177,438,799.80/20,547.60
  6. Step 6: Final answer
    x = 8,635.50

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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.