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Finding the Fourth Proportional to 14,785, 20,403.13 and 8,411.58

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Solution

The fourth proportional to 14,785, 20,403.13 and 8,411.58 is: 11,607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,785 : 20,403.13 = 8,411.58 : x
  2. Step 2: Convert to fraction form
    14,785/20,403.13 = 8,411.58/x
  3. Step 3: Cross multiply
    14,785x = 20,403.13 × 8,411.58
  4. Step 4: Simplify right side
    14,785x = 171,622,518.19
  5. Step 5: Solve for x
    x = 171,622,518.19/14,785
  6. Step 6: Final answer
    x = 11,607.88

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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.