Home / 21,648.71-29,760.53-18,612.64

Finding the Fourth Proportional to 21,648.71, 29,760.53 and 18,612.64

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Solution

The fourth proportional to 21,648.71, 29,760.53 and 18,612.64 is: 25,586.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,648.71 : 29,760.53 = 18,612.64 : x
  2. Step 2: Convert to fraction form
    21,648.71/29,760.53 = 18,612.64/x
  3. Step 3: Cross multiply
    21,648.71x = 29,760.53 × 18,612.64
  4. Step 4: Simplify right side
    21,648.71x = 553,922,031.10
  5. Step 5: Solve for x
    x = 553,922,031.10/21,648.71
  6. Step 6: Final answer
    x = 25,586.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.