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Finding the Fourth Proportional to 15,018.84, 20,726.82 and 9,718.20

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Solution

The fourth proportional to 15,018.84, 20,726.82 and 9,718.20 is: 13,411.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.84 : 20,726.82 = 9,718.20 : x
  2. Step 2: Convert to fraction form
    15,018.84/20,726.82 = 9,718.20/x
  3. Step 3: Cross multiply
    15,018.84x = 20,726.82 × 9,718.20
  4. Step 4: Simplify right side
    15,018.84x = 201,427,382.12
  5. Step 5: Solve for x
    x = 201,427,382.12/15,018.84
  6. Step 6: Final answer
    x = 13,411.65

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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.