Home / 21,390.10-29,487.46-14,665.07

Finding the Fourth Proportional to 21,390.10, 29,487.46 and 14,665.07

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Solution

The fourth proportional to 21,390.10, 29,487.46 and 14,665.07 is: 20,216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.10 : 29,487.46 = 14,665.07 : x
  2. Step 2: Convert to fraction form
    21,390.10/29,487.46 = 14,665.07/x
  3. Step 3: Cross multiply
    21,390.10x = 29,487.46 × 14,665.07
  4. Step 4: Simplify right side
    21,390.10x = 432,435,591.70
  5. Step 5: Solve for x
    x = 432,435,591.70/21,390.10
  6. Step 6: Final answer
    x = 20,216.63

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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.