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Finding the Fourth Proportional to 21,851.55, 32,770.53 and 7,809.63

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Solution

The fourth proportional to 21,851.55, 32,770.53 and 7,809.63 is: 11,712.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,851.55 : 32,770.53 = 7,809.63 : x
  2. Step 2: Convert to fraction form
    21,851.55/32,770.53 = 7,809.63/x
  3. Step 3: Cross multiply
    21,851.55x = 32,770.53 × 7,809.63
  4. Step 4: Simplify right side
    21,851.55x = 255,925,714.20
  5. Step 5: Solve for x
    x = 255,925,714.20/21,851.55
  6. Step 6: Final answer
    x = 11,712.02

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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.