Home / 21,225.10-29,282.68-13,155.07

Finding the Fourth Proportional to 21,225.10, 29,282.68 and 13,155.07

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Solution

The fourth proportional to 21,225.10, 29,282.68 and 13,155.07 is: 18,149.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.10 : 29,282.68 = 13,155.07 : x
  2. Step 2: Convert to fraction form
    21,225.10/29,282.68 = 13,155.07/x
  3. Step 3: Cross multiply
    21,225.10x = 29,282.68 × 13,155.07
  4. Step 4: Simplify right side
    21,225.10x = 385,215,705.19
  5. Step 5: Solve for x
    x = 385,215,705.19/21,225.10
  6. Step 6: Final answer
    x = 18,149.06

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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.