Home / 28,520.88-39,359.28-15,774.72

Finding the Fourth Proportional to 28,520.88, 39,359.28 and 15,774.72

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Solution

The fourth proportional to 28,520.88, 39,359.28 and 15,774.72 is: 21,769.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.88 : 39,359.28 = 15,774.72 : x
  2. Step 2: Convert to fraction form
    28,520.88/39,359.28 = 15,774.72/x
  3. Step 3: Cross multiply
    28,520.88x = 39,359.28 × 15,774.72
  4. Step 4: Simplify right side
    28,520.88x = 620,881,621.40
  5. Step 5: Solve for x
    x = 620,881,621.40/28,520.88
  6. Step 6: Final answer
    x = 21,769.37

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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.