Home / 21,387.60-29,507.36-12,433.05

Finding the Fourth Proportional to 21,387.60, 29,507.36 and 12,433.05

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Solution

The fourth proportional to 21,387.60, 29,507.36 and 12,433.05 is: 17,153.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.60 : 29,507.36 = 12,433.05 : x
  2. Step 2: Convert to fraction form
    21,387.60/29,507.36 = 12,433.05/x
  3. Step 3: Cross multiply
    21,387.60x = 29,507.36 × 12,433.05
  4. Step 4: Simplify right side
    21,387.60x = 366,866,420.08
  5. Step 5: Solve for x
    x = 366,866,420.08/21,387.60
  6. Step 6: Final answer
    x = 17,153.23

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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.