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Finding the Fourth Proportional to 22,368.76, 30,815.50 and 15,641.80

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Solution

The fourth proportional to 22,368.76, 30,815.50 and 15,641.80 is: 21,548.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,368.76 : 30,815.50 = 15,641.80 : x
  2. Step 2: Convert to fraction form
    22,368.76/30,815.50 = 15,641.80/x
  3. Step 3: Cross multiply
    22,368.76x = 30,815.50 × 15,641.80
  4. Step 4: Simplify right side
    22,368.76x = 482,009,887.90
  5. Step 5: Solve for x
    x = 482,009,887.90/22,368.76
  6. Step 6: Final answer
    x = 21,548.35

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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.