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Finding the Fourth Proportional to 37,779.50, 52,137.79 and 21,869.08

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Solution

The fourth proportional to 37,779.50, 52,137.79 and 21,869.08 is: 30,180.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,779.50 : 52,137.79 = 21,869.08 : x
  2. Step 2: Convert to fraction form
    37,779.50/52,137.79 = 21,869.08/x
  3. Step 3: Cross multiply
    37,779.50x = 52,137.79 × 21,869.08
  4. Step 4: Simplify right side
    37,779.50x = 1,140,205,315.52
  5. Step 5: Solve for x
    x = 1,140,205,315.52/37,779.50
  6. Step 6: Final answer
    x = 30,180.53

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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.