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Finding the Fourth Proportional to 21,253.91, 31,883.64 and 7,017.65

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Solution

The fourth proportional to 21,253.91, 31,883.64 and 7,017.65 is: 10,527.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.91 : 31,883.64 = 7,017.65 : x
  2. Step 2: Convert to fraction form
    21,253.91/31,883.64 = 7,017.65/x
  3. Step 3: Cross multiply
    21,253.91x = 31,883.64 × 7,017.65
  4. Step 4: Simplify right side
    21,253.91x = 223,748,066.83
  5. Step 5: Solve for x
    x = 223,748,066.83/21,253.91
  6. Step 6: Final answer
    x = 10,527.39

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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.