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Finding the Fourth Proportional to 26,689.16, 40,040.29 and 18,807.05

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Solution

The fourth proportional to 26,689.16, 40,040.29 and 18,807.05 is: 28,215.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,689.16 : 40,040.29 = 18,807.05 : x
  2. Step 2: Convert to fraction form
    26,689.16/40,040.29 = 18,807.05/x
  3. Step 3: Cross multiply
    26,689.16x = 40,040.29 × 18,807.05
  4. Step 4: Simplify right side
    26,689.16x = 753,039,859.65
  5. Step 5: Solve for x
    x = 753,039,859.65/26,689.16
  6. Step 6: Final answer
    x = 28,215.19

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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.