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Finding the Fourth Proportional to 16,420.65, 22,660.62 and 9,347.52

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Solution

The fourth proportional to 16,420.65, 22,660.62 and 9,347.52 is: 12,899.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,420.65 : 22,660.62 = 9,347.52 : x
  2. Step 2: Convert to fraction form
    16,420.65/22,660.62 = 9,347.52/x
  3. Step 3: Cross multiply
    16,420.65x = 22,660.62 × 9,347.52
  4. Step 4: Simplify right side
    16,420.65x = 211,820,598.66
  5. Step 5: Solve for x
    x = 211,820,598.66/16,420.65
  6. Step 6: Final answer
    x = 12,899.65

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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.