Home / 28,385.42-39,173.68-15,810.14

Finding the Fourth Proportional to 28,385.42, 39,173.68 and 15,810.14

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Solution

The fourth proportional to 28,385.42, 39,173.68 and 15,810.14 is: 21,819.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.42 : 39,173.68 = 15,810.14 : x
  2. Step 2: Convert to fraction form
    28,385.42/39,173.68 = 15,810.14/x
  3. Step 3: Cross multiply
    28,385.42x = 39,173.68 × 15,810.14
  4. Step 4: Simplify right side
    28,385.42x = 619,341,365.12
  5. Step 5: Solve for x
    x = 619,341,365.12/28,385.42
  6. Step 6: Final answer
    x = 21,819.00

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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.