Home / 28,157.14-38,856.90-15,581.89

Finding the Fourth Proportional to 28,157.14, 38,856.90 and 15,581.89

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Solution

The fourth proportional to 28,157.14, 38,856.90 and 15,581.89 is: 21,503.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.14 : 38,856.90 = 15,581.89 : x
  2. Step 2: Convert to fraction form
    28,157.14/38,856.90 = 15,581.89/x
  3. Step 3: Cross multiply
    28,157.14x = 38,856.90 × 15,581.89
  4. Step 4: Simplify right side
    28,157.14x = 605,463,941.54
  5. Step 5: Solve for x
    x = 605,463,941.54/28,157.14
  6. Step 6: Final answer
    x = 21,503.03

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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.