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Finding the Fourth Proportional to 22,423.77, 30,937.95 and 12,990.51

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Solution

The fourth proportional to 22,423.77, 30,937.95 and 12,990.51 is: 17,922.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,423.77 : 30,937.95 = 12,990.51 : x
  2. Step 2: Convert to fraction form
    22,423.77/30,937.95 = 12,990.51/x
  3. Step 3: Cross multiply
    22,423.77x = 30,937.95 × 12,990.51
  4. Step 4: Simplify right side
    22,423.77x = 401,899,748.85
  5. Step 5: Solve for x
    x = 401,899,748.85/22,423.77
  6. Step 6: Final answer
    x = 17,922.93

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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.