Home / 28,387.02-39,173.58-15,811.50

Finding the Fourth Proportional to 28,387.02, 39,173.58 and 15,811.50

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Solution

The fourth proportional to 28,387.02, 39,173.58 and 15,811.50 is: 21,819.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.02 : 39,173.58 = 15,811.50 : x
  2. Step 2: Convert to fraction form
    28,387.02/39,173.58 = 15,811.50/x
  3. Step 3: Cross multiply
    28,387.02x = 39,173.58 × 15,811.50
  4. Step 4: Simplify right side
    28,387.02x = 619,393,060.17
  5. Step 5: Solve for x
    x = 619,393,060.17/28,387.02
  6. Step 6: Final answer
    x = 21,819.59

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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.