Home / 15,851.16-21,873.18-8,775.72

Finding the Fourth Proportional to 15,851.16, 21,873.18 and 8,775.72

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Solution

The fourth proportional to 15,851.16, 21,873.18 and 8,775.72 is: 12,109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.16 : 21,873.18 = 8,775.72 : x
  2. Step 2: Convert to fraction form
    15,851.16/21,873.18 = 8,775.72/x
  3. Step 3: Cross multiply
    15,851.16x = 21,873.18 × 8,775.72
  4. Step 4: Simplify right side
    15,851.16x = 191,952,903.19
  5. Step 5: Solve for x
    x = 191,952,903.19/15,851.16
  6. Step 6: Final answer
    x = 12,109.71

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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.