Home / 21,580.40-29,779.80-12,145.52

Finding the Fourth Proportional to 21,580.40, 29,779.80 and 12,145.52

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Solution

The fourth proportional to 21,580.40, 29,779.80 and 12,145.52 is: 16,760.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.40 : 29,779.80 = 12,145.52 : x
  2. Step 2: Convert to fraction form
    21,580.40/29,779.80 = 12,145.52/x
  3. Step 3: Cross multiply
    21,580.40x = 29,779.80 × 12,145.52
  4. Step 4: Simplify right side
    21,580.40x = 361,691,156.50
  5. Step 5: Solve for x
    x = 361,691,156.50/21,580.40
  6. Step 6: Final answer
    x = 16,760.17

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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.