Home / 15,420.78-23,131.02-4,891.80

Finding the Fourth Proportional to 15,420.78, 23,131.02 and 4,891.80

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Solution

The fourth proportional to 15,420.78, 23,131.02 and 4,891.80 is: 7,337.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.78 : 23,131.02 = 4,891.80 : x
  2. Step 2: Convert to fraction form
    15,420.78/23,131.02 = 4,891.80/x
  3. Step 3: Cross multiply
    15,420.78x = 23,131.02 × 4,891.80
  4. Step 4: Simplify right side
    15,420.78x = 113,152,323.64
  5. Step 5: Solve for x
    x = 113,152,323.64/15,420.78
  6. Step 6: Final answer
    x = 7,337.65

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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.