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Finding the Fourth Proportional to 9,921.51, 14,859.47 and 5,751.21

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Solution

The fourth proportional to 9,921.51, 14,859.47 and 5,751.21 is: 8,613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.51 : 14,859.47 = 5,751.21 : x
  2. Step 2: Convert to fraction form
    9,921.51/14,859.47 = 5,751.21/x
  3. Step 3: Cross multiply
    9,921.51x = 14,859.47 × 5,751.21
  4. Step 4: Simplify right side
    9,921.51x = 85,459,932.46
  5. Step 5: Solve for x
    x = 85,459,932.46/9,921.51
  6. Step 6: Final answer
    x = 8,613.60

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1.5x scale

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.