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Finding the Fourth Proportional to 14,005.53, 20,959.95 and 8,666.52

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Solution

The fourth proportional to 14,005.53, 20,959.95 and 8,666.52 is: 12,969.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.53 : 20,959.95 = 8,666.52 : x
  2. Step 2: Convert to fraction form
    14,005.53/20,959.95 = 8,666.52/x
  3. Step 3: Cross multiply
    14,005.53x = 20,959.95 × 8,666.52
  4. Step 4: Simplify right side
    14,005.53x = 181,649,721.07
  5. Step 5: Solve for x
    x = 181,649,721.07/14,005.53
  6. Step 6: Final answer
    x = 12,969.86

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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.