Home / 13,686.84-20,531.28-4,921.80

Finding the Fourth Proportional to 13,686.84, 20,531.28 and 4,921.80

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Solution

The fourth proportional to 13,686.84, 20,531.28 and 4,921.80 is: 7,383.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.84 : 20,531.28 = 4,921.80 : x
  2. Step 2: Convert to fraction form
    13,686.84/20,531.28 = 4,921.80/x
  3. Step 3: Cross multiply
    13,686.84x = 20,531.28 × 4,921.80
  4. Step 4: Simplify right side
    13,686.84x = 101,050,853.90
  5. Step 5: Solve for x
    x = 101,050,853.90/13,686.84
  6. Step 6: Final answer
    x = 7,383.07

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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.