Home / 21,289.80-29,363.16-18,490.44

Finding the Fourth Proportional to 21,289.80, 29,363.16 and 18,490.44

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Solution

The fourth proportional to 21,289.80, 29,363.16 and 18,490.44 is: 25,502.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.80 : 29,363.16 = 18,490.44 : x
  2. Step 2: Convert to fraction form
    21,289.80/29,363.16 = 18,490.44/x
  3. Step 3: Cross multiply
    21,289.80x = 29,363.16 × 18,490.44
  4. Step 4: Simplify right side
    21,289.80x = 542,937,748.19
  5. Step 5: Solve for x
    x = 542,937,748.19/21,289.80
  6. Step 6: Final answer
    x = 25,502.25

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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.