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Finding the Fourth Proportional to 15,779.22, 21,769.20 and 9,062.40

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Solution

The fourth proportional to 15,779.22, 21,769.20 and 9,062.40 is: 12,502.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.22 : 21,769.20 = 9,062.40 : x
  2. Step 2: Convert to fraction form
    15,779.22/21,769.20 = 9,062.40/x
  3. Step 3: Cross multiply
    15,779.22x = 21,769.20 × 9,062.40
  4. Step 4: Simplify right side
    15,779.22x = 197,281,198.08
  5. Step 5: Solve for x
    x = 197,281,198.08/15,779.22
  6. Step 6: Final answer
    x = 12,502.60

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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.