Home / 21,580.96-29,779.60-12,020.52

Finding the Fourth Proportional to 21,580.96, 29,779.60 and 12,020.52

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Solution

The fourth proportional to 21,580.96, 29,779.60 and 12,020.52 is: 16,587.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.96 : 29,779.60 = 12,020.52 : x
  2. Step 2: Convert to fraction form
    21,580.96/29,779.60 = 12,020.52/x
  3. Step 3: Cross multiply
    21,580.96x = 29,779.60 × 12,020.52
  4. Step 4: Simplify right side
    21,580.96x = 357,966,277.39
  5. Step 5: Solve for x
    x = 357,966,277.39/21,580.96
  6. Step 6: Final answer
    x = 16,587.13

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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.