Home / 21,421.60-29,521.74-15,443.08

Finding the Fourth Proportional to 21,421.60, 29,521.74 and 15,443.08

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Solution

The fourth proportional to 21,421.60, 29,521.74 and 15,443.08 is: 21,282.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.60 : 29,521.74 = 15,443.08 : x
  2. Step 2: Convert to fraction form
    21,421.60/29,521.74 = 15,443.08/x
  3. Step 3: Cross multiply
    21,421.60x = 29,521.74 × 15,443.08
  4. Step 4: Simplify right side
    21,421.60x = 455,906,592.56
  5. Step 5: Solve for x
    x = 455,906,592.56/21,421.60
  6. Step 6: Final answer
    x = 21,282.56

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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.