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Finding the Fourth Proportional to 8,728.15, 12,045.10 and 4,749.51

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Solution

The fourth proportional to 8,728.15, 12,045.10 and 4,749.51 is: 6,554.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.15 : 12,045.10 = 4,749.51 : x
  2. Step 2: Convert to fraction form
    8,728.15/12,045.10 = 4,749.51/x
  3. Step 3: Cross multiply
    8,728.15x = 12,045.10 × 4,749.51
  4. Step 4: Simplify right side
    8,728.15x = 57,208,322.90
  5. Step 5: Solve for x
    x = 57,208,322.90/8,728.15
  6. Step 6: Final answer
    x = 6,554.46

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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.