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Finding the Fourth Proportional to 12,478.66, 17,218.92 and 7,443.48

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Solution

The fourth proportional to 12,478.66, 17,218.92 and 7,443.48 is: 10,271.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.66 : 17,218.92 = 7,443.48 : x
  2. Step 2: Convert to fraction form
    12,478.66/17,218.92 = 7,443.48/x
  3. Step 3: Cross multiply
    12,478.66x = 17,218.92 × 7,443.48
  4. Step 4: Simplify right side
    12,478.66x = 128,168,686.64
  5. Step 5: Solve for x
    x = 128,168,686.64/12,478.66
  6. Step 6: Final answer
    x = 10,271.03

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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.