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Finding the Fourth Proportional to 40,889.52, 61,290.54 and 21,148.20

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Solution

The fourth proportional to 40,889.52, 61,290.54 and 21,148.20 is: 31,699.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,889.52 : 61,290.54 = 21,148.20 : x
  2. Step 2: Convert to fraction form
    40,889.52/61,290.54 = 21,148.20/x
  3. Step 3: Cross multiply
    40,889.52x = 61,290.54 × 21,148.20
  4. Step 4: Simplify right side
    40,889.52x = 1,296,184,598.03
  5. Step 5: Solve for x
    x = 1,296,184,598.03/40,889.52
  6. Step 6: Final answer
    x = 31,699.68

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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.