Home / 15,223.89-21,008.91-8,509.53

Finding the Fourth Proportional to 15,223.89, 21,008.91 and 8,509.53

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Solution

The fourth proportional to 15,223.89, 21,008.91 and 8,509.53 is: 11,743.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,223.89 : 21,008.91 = 8,509.53 : x
  2. Step 2: Convert to fraction form
    15,223.89/21,008.91 = 8,509.53/x
  3. Step 3: Cross multiply
    15,223.89x = 21,008.91 × 8,509.53
  4. Step 4: Simplify right side
    15,223.89x = 178,775,949.91
  5. Step 5: Solve for x
    x = 178,775,949.91/15,223.89
  6. Step 6: Final answer
    x = 11,743.12

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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.