Home / 13,390.64-18,479.04-7,422.25

Finding the Fourth Proportional to 13,390.64, 18,479.04 and 7,422.25

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Solution

The fourth proportional to 13,390.64, 18,479.04 and 7,422.25 is: 10,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.64 : 18,479.04 = 7,422.25 : x
  2. Step 2: Convert to fraction form
    13,390.64/18,479.04 = 7,422.25/x
  3. Step 3: Cross multiply
    13,390.64x = 18,479.04 × 7,422.25
  4. Step 4: Simplify right side
    13,390.64x = 137,156,017.53
  5. Step 5: Solve for x
    x = 137,156,017.53/13,390.64
  6. Step 6: Final answer
    x = 10,242.68

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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.