Home / 21,400.48-32,089.12-11,915.72

Finding the Fourth Proportional to 21,400.48, 32,089.12 and 11,915.72

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Solution

The fourth proportional to 21,400.48, 32,089.12 and 11,915.72 is: 17,867.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.48 : 32,089.12 = 11,915.72 : x
  2. Step 2: Convert to fraction form
    21,400.48/32,089.12 = 11,915.72/x
  3. Step 3: Cross multiply
    21,400.48x = 32,089.12 × 11,915.72
  4. Step 4: Simplify right side
    21,400.48x = 382,364,968.97
  5. Step 5: Solve for x
    x = 382,364,968.97/21,400.48
  6. Step 6: Final answer
    x = 17,867.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.