Home / 15,113.55-20,855.48-8,740.55

Finding the Fourth Proportional to 15,113.55, 20,855.48 and 8,740.55

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Solution

The fourth proportional to 15,113.55, 20,855.48 and 8,740.55 is: 12,061.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.55 : 20,855.48 = 8,740.55 : x
  2. Step 2: Convert to fraction form
    15,113.55/20,855.48 = 8,740.55/x
  3. Step 3: Cross multiply
    15,113.55x = 20,855.48 × 8,740.55
  4. Step 4: Simplify right side
    15,113.55x = 182,288,365.71
  5. Step 5: Solve for x
    x = 182,288,365.71/15,113.55
  6. Step 6: Final answer
    x = 12,061.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.