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Finding the Fourth Proportional to 14,869.51, 20,519.93 and 8,155.42

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Solution

The fourth proportional to 14,869.51, 20,519.93 and 8,155.42 is: 11,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,869.51 : 20,519.93 = 8,155.42 : x
  2. Step 2: Convert to fraction form
    14,869.51/20,519.93 = 8,155.42/x
  3. Step 3: Cross multiply
    14,869.51x = 20,519.93 × 8,155.42
  4. Step 4: Simplify right side
    14,869.51x = 167,348,616.61
  5. Step 5: Solve for x
    x = 167,348,616.61/14,869.51
  6. Step 6: Final answer
    x = 11,254.48

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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.