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Finding the Fourth Proportional to 26,689.27, 40,038.78 and 8,918.24

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Solution

The fourth proportional to 26,689.27, 40,038.78 and 8,918.24 is: 13,378.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,689.27 : 40,038.78 = 8,918.24 : x
  2. Step 2: Convert to fraction form
    26,689.27/40,038.78 = 8,918.24/x
  3. Step 3: Cross multiply
    26,689.27x = 40,038.78 × 8,918.24
  4. Step 4: Simplify right side
    26,689.27x = 357,075,449.35
  5. Step 5: Solve for x
    x = 357,075,449.35/26,689.27
  6. Step 6: Final answer
    x = 13,378.99

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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.