Home / 21,977.40-32,966.10-13,207.80

Finding the Fourth Proportional to 21,977.40, 32,966.10 and 13,207.80

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Solution

The fourth proportional to 21,977.40, 32,966.10 and 13,207.80 is: 19,811.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.40 : 32,966.10 = 13,207.80 : x
  2. Step 2: Convert to fraction form
    21,977.40/32,966.10 = 13,207.80/x
  3. Step 3: Cross multiply
    21,977.40x = 32,966.10 × 13,207.80
  4. Step 4: Simplify right side
    21,977.40x = 435,409,655.58
  5. Step 5: Solve for x
    x = 435,409,655.58/21,977.40
  6. Step 6: Final answer
    x = 19,811.70

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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.