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Finding the Fourth Proportional to 39,779.74, 59,663.13 and 12,077.74

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Solution

The fourth proportional to 39,779.74, 59,663.13 and 12,077.74 is: 18,114.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,779.74 : 59,663.13 = 12,077.74 : x
  2. Step 2: Convert to fraction form
    39,779.74/59,663.13 = 12,077.74/x
  3. Step 3: Cross multiply
    39,779.74x = 59,663.13 × 12,077.74
  4. Step 4: Simplify right side
    39,779.74x = 720,595,771.73
  5. Step 5: Solve for x
    x = 720,595,771.73/39,779.74
  6. Step 6: Final answer
    x = 18,114.64

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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.