Home / 13,988.40-20,977.71-4,125.06

Finding the Fourth Proportional to 13,988.40, 20,977.71 and 4,125.06

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Solution

The fourth proportional to 13,988.40, 20,977.71 and 4,125.06 is: 6,186.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.40 : 20,977.71 = 4,125.06 : x
  2. Step 2: Convert to fraction form
    13,988.40/20,977.71 = 4,125.06/x
  3. Step 3: Cross multiply
    13,988.40x = 20,977.71 × 4,125.06
  4. Step 4: Simplify right side
    13,988.40x = 86,534,312.41
  5. Step 5: Solve for x
    x = 86,534,312.41/13,988.40
  6. Step 6: Final answer
    x = 6,186.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.