Home / 12,931.40-17,844.86-7,904.04

Finding the Fourth Proportional to 12,931.40, 17,844.86 and 7,904.04

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Solution

The fourth proportional to 12,931.40, 17,844.86 and 7,904.04 is: 10,907.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.40 : 17,844.86 = 7,904.04 : x
  2. Step 2: Convert to fraction form
    12,931.40/17,844.86 = 7,904.04/x
  3. Step 3: Cross multiply
    12,931.40x = 17,844.86 × 7,904.04
  4. Step 4: Simplify right side
    12,931.40x = 141,046,487.23
  5. Step 5: Solve for x
    x = 141,046,487.23/12,931.40
  6. Step 6: Final answer
    x = 10,907.29

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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.