Home / 8,720.41-12,038.61-5,902.67

Finding the Fourth Proportional to 8,720.41, 12,038.61 and 5,902.67

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Solution

The fourth proportional to 8,720.41, 12,038.61 and 5,902.67 is: 8,148.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.41 : 12,038.61 = 5,902.67 : x
  2. Step 2: Convert to fraction form
    8,720.41/12,038.61 = 5,902.67/x
  3. Step 3: Cross multiply
    8,720.41x = 12,038.61 × 5,902.67
  4. Step 4: Simplify right side
    8,720.41x = 71,059,852.38
  5. Step 5: Solve for x
    x = 71,059,852.38/8,720.41
  6. Step 6: Final answer
    x = 8,148.69

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Half scale
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Double scale
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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.