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Finding the Fourth Proportional to 18,459.64, 27,689.69 and 5,312.13

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Solution

The fourth proportional to 18,459.64, 27,689.69 and 5,312.13 is: 7,968.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459.64 : 27,689.69 = 5,312.13 : x
  2. Step 2: Convert to fraction form
    18,459.64/27,689.69 = 5,312.13/x
  3. Step 3: Cross multiply
    18,459.64x = 27,689.69 × 5,312.13
  4. Step 4: Simplify right side
    18,459.64x = 147,091,232.94
  5. Step 5: Solve for x
    x = 147,091,232.94/18,459.64
  6. Step 6: Final answer
    x = 7,968.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.