Home / 21,222.15-31,803.05-15,631.53

Finding the Fourth Proportional to 21,222.15, 31,803.05 and 15,631.53

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Solution

The fourth proportional to 21,222.15, 31,803.05 and 15,631.53 is: 23,425.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.15 : 31,803.05 = 15,631.53 : x
  2. Step 2: Convert to fraction form
    21,222.15/31,803.05 = 15,631.53/x
  3. Step 3: Cross multiply
    21,222.15x = 31,803.05 × 15,631.53
  4. Step 4: Simplify right side
    21,222.15x = 497,130,252.01
  5. Step 5: Solve for x
    x = 497,130,252.01/21,222.15
  6. Step 6: Final answer
    x = 23,425.07

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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.