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Finding the Fourth Proportional to 15,894.18, 21,934.80 and 8,820.63

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Solution

The fourth proportional to 15,894.18, 21,934.80 and 8,820.63 is: 12,172.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.18 : 21,934.80 = 8,820.63 : x
  2. Step 2: Convert to fraction form
    15,894.18/21,934.80 = 8,820.63/x
  3. Step 3: Cross multiply
    15,894.18x = 21,934.80 × 8,820.63
  4. Step 4: Simplify right side
    15,894.18x = 193,478,754.92
  5. Step 5: Solve for x
    x = 193,478,754.92/15,894.18
  6. Step 6: Final answer
    x = 12,172.93

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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.