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Finding the Fourth Proportional to 22,645.16, 31,216.02 and 15,920.13

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Solution

The fourth proportional to 22,645.16, 31,216.02 and 15,920.13 is: 21,945.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,645.16 : 31,216.02 = 15,920.13 : x
  2. Step 2: Convert to fraction form
    22,645.16/31,216.02 = 15,920.13/x
  3. Step 3: Cross multiply
    22,645.16x = 31,216.02 × 15,920.13
  4. Step 4: Simplify right side
    22,645.16x = 496,963,096.48
  5. Step 5: Solve for x
    x = 496,963,096.48/22,645.16
  6. Step 6: Final answer
    x = 21,945.67

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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.