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Finding the Fourth Proportional to 15,851.20, 21,873.76 and 8,777.16

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Solution

The fourth proportional to 15,851.20, 21,873.76 and 8,777.16 is: 12,111.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.20 : 21,873.76 = 8,777.16 : x
  2. Step 2: Convert to fraction form
    15,851.20/21,873.76 = 8,777.16/x
  3. Step 3: Cross multiply
    15,851.20x = 21,873.76 × 8,777.16
  4. Step 4: Simplify right side
    15,851.20x = 191,989,491.32
  5. Step 5: Solve for x
    x = 191,989,491.32/15,851.20
  6. Step 6: Final answer
    x = 12,111.98

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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.