Home / 13,540.94-18,686.40-7,875.80

Finding the Fourth Proportional to 13,540.94, 18,686.40 and 7,875.80

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Solution

The fourth proportional to 13,540.94, 18,686.40 and 7,875.80 is: 10,868.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.94 : 18,686.40 = 7,875.80 : x
  2. Step 2: Convert to fraction form
    13,540.94/18,686.40 = 7,875.80/x
  3. Step 3: Cross multiply
    13,540.94x = 18,686.40 × 7,875.80
  4. Step 4: Simplify right side
    13,540.94x = 147,170,349.12
  5. Step 5: Solve for x
    x = 147,170,349.12/13,540.94
  6. Step 6: Final answer
    x = 10,868.55

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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.