Home / 28,521.20-39,357.96-15,774.50

Finding the Fourth Proportional to 28,521.20, 39,357.96 and 15,774.50

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Solution

The fourth proportional to 28,521.20, 39,357.96 and 15,774.50 is: 21,768.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.20 : 39,357.96 = 15,774.50 : x
  2. Step 2: Convert to fraction form
    28,521.20/39,357.96 = 15,774.50/x
  3. Step 3: Cross multiply
    28,521.20x = 39,357.96 × 15,774.50
  4. Step 4: Simplify right side
    28,521.20x = 620,852,140.02
  5. Step 5: Solve for x
    x = 620,852,140.02/28,521.20
  6. Step 6: Final answer
    x = 21,768.09

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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.