Home / 28,354.85-39,129.38-15,607.76

Finding the Fourth Proportional to 28,354.85, 39,129.38 and 15,607.76

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Solution

The fourth proportional to 28,354.85, 39,129.38 and 15,607.76 is: 21,538.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.85 : 39,129.38 = 15,607.76 : x
  2. Step 2: Convert to fraction form
    28,354.85/39,129.38 = 15,607.76/x
  3. Step 3: Cross multiply
    28,354.85x = 39,129.38 × 15,607.76
  4. Step 4: Simplify right side
    28,354.85x = 610,721,971.99
  5. Step 5: Solve for x
    x = 610,721,971.99/28,354.85
  6. Step 6: Final answer
    x = 21,538.54

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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.