Home / 12,864.64-17,740.80-10,977.28

Finding the Fourth Proportional to 12,864.64, 17,740.80 and 10,977.28

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Solution

The fourth proportional to 12,864.64, 17,740.80 and 10,977.28 is: 15,138.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,864.64 : 17,740.80 = 10,977.28 : x
  2. Step 2: Convert to fraction form
    12,864.64/17,740.80 = 10,977.28/x
  3. Step 3: Cross multiply
    12,864.64x = 17,740.80 × 10,977.28
  4. Step 4: Simplify right side
    12,864.64x = 194,745,729.02
  5. Step 5: Solve for x
    x = 194,745,729.02/12,864.64
  6. Step 6: Final answer
    x = 15,138.06

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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.