Home / 28,145.28-38,842.48-15,569.76

Finding the Fourth Proportional to 28,145.28, 38,842.48 and 15,569.76

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Solution

The fourth proportional to 28,145.28, 38,842.48 and 15,569.76 is: 21,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.28 : 38,842.48 = 15,569.76 : x
  2. Step 2: Convert to fraction form
    28,145.28/38,842.48 = 15,569.76/x
  3. Step 3: Cross multiply
    28,145.28x = 38,842.48 × 15,569.76
  4. Step 4: Simplify right side
    28,145.28x = 604,768,091.40
  5. Step 5: Solve for x
    x = 604,768,091.40/28,145.28
  6. Step 6: Final answer
    x = 21,487.37

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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.