Home / 21,001.48-31,492.20-12,238.88

Finding the Fourth Proportional to 21,001.48, 31,492.20 and 12,238.88

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Solution

The fourth proportional to 21,001.48, 31,492.20 and 12,238.88 is: 18,352.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.48 : 31,492.20 = 12,238.88 : x
  2. Step 2: Convert to fraction form
    21,001.48/31,492.20 = 12,238.88/x
  3. Step 3: Cross multiply
    21,001.48x = 31,492.20 × 12,238.88
  4. Step 4: Simplify right side
    21,001.48x = 385,429,256.74
  5. Step 5: Solve for x
    x = 385,429,256.74/21,001.48
  6. Step 6: Final answer
    x = 18,352.48

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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.