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Finding the Fourth Proportional to 15,014.64, 20,721.75 and 8,641.47

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Solution

The fourth proportional to 15,014.64, 20,721.75 and 8,641.47 is: 11,926.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.64 : 20,721.75 = 8,641.47 : x
  2. Step 2: Convert to fraction form
    15,014.64/20,721.75 = 8,641.47/x
  3. Step 3: Cross multiply
    15,014.64x = 20,721.75 × 8,641.47
  4. Step 4: Simplify right side
    15,014.64x = 179,066,421.44
  5. Step 5: Solve for x
    x = 179,066,421.44/15,014.64
  6. Step 6: Final answer
    x = 11,926.12

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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.