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Finding the Fourth Proportional to 21,337.83, 31,980.83 and 15,099.67

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Solution

The fourth proportional to 21,337.83, 31,980.83 and 15,099.67 is: 22,631.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.83 : 31,980.83 = 15,099.67 : x
  2. Step 2: Convert to fraction form
    21,337.83/31,980.83 = 15,099.67/x
  3. Step 3: Cross multiply
    21,337.83x = 31,980.83 × 15,099.67
  4. Step 4: Simplify right side
    21,337.83x = 482,899,763.91
  5. Step 5: Solve for x
    x = 482,899,763.91/21,337.83
  6. Step 6: Final answer
    x = 22,631.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.