Home / 15,223.20-21,009.12-8,851.80

Finding the Fourth Proportional to 15,223.20, 21,009.12 and 8,851.80

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Solution

The fourth proportional to 15,223.20, 21,009.12 and 8,851.80 is: 12,216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,223.20 : 21,009.12 = 8,851.80 : x
  2. Step 2: Convert to fraction form
    15,223.20/21,009.12 = 8,851.80/x
  3. Step 3: Cross multiply
    15,223.20x = 21,009.12 × 8,851.80
  4. Step 4: Simplify right side
    15,223.20x = 185,968,528.42
  5. Step 5: Solve for x
    x = 185,968,528.42/15,223.20
  6. Step 6: Final answer
    x = 12,216.13

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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.