Home / 21,406.20-29,541.48-13,231.62

Finding the Fourth Proportional to 21,406.20, 29,541.48 and 13,231.62

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Solution

The fourth proportional to 21,406.20, 29,541.48 and 13,231.62 is: 18,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.20 : 29,541.48 = 13,231.62 : x
  2. Step 2: Convert to fraction form
    21,406.20/29,541.48 = 13,231.62/x
  3. Step 3: Cross multiply
    21,406.20x = 29,541.48 × 13,231.62
  4. Step 4: Simplify right side
    21,406.20x = 390,881,637.60
  5. Step 5: Solve for x
    x = 390,881,637.60/21,406.20
  6. Step 6: Final answer
    x = 18,260.21

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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.