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Finding the Fourth Proportional to 22,068.50, 30,455.16 and 13,455.18

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Solution

The fourth proportional to 22,068.50, 30,455.16 and 13,455.18 is: 18,568.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,068.50 : 30,455.16 = 13,455.18 : x
  2. Step 2: Convert to fraction form
    22,068.50/30,455.16 = 13,455.18/x
  3. Step 3: Cross multiply
    22,068.50x = 30,455.16 × 13,455.18
  4. Step 4: Simplify right side
    22,068.50x = 409,779,787.04
  5. Step 5: Solve for x
    x = 409,779,787.04/22,068.50
  6. Step 6: Final answer
    x = 18,568.54

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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.