Home / 21,471.54-29,642.40-12,975.18

Finding the Fourth Proportional to 21,471.54, 29,642.40 and 12,975.18

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Solution

The fourth proportional to 21,471.54, 29,642.40 and 12,975.18 is: 17,912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.54 : 29,642.40 = 12,975.18 : x
  2. Step 2: Convert to fraction form
    21,471.54/29,642.40 = 12,975.18/x
  3. Step 3: Cross multiply
    21,471.54x = 29,642.40 × 12,975.18
  4. Step 4: Simplify right side
    21,471.54x = 384,615,475.63
  5. Step 5: Solve for x
    x = 384,615,475.63/21,471.54
  6. Step 6: Final answer
    x = 17,912.80

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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.