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Finding the Fourth Proportional to 21,253.91, 31,714.80 and 19,040.18

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Solution

The fourth proportional to 21,253.91, 31,714.80 and 19,040.18 is: 28,411.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.91 : 31,714.80 = 19,040.18 : x
  2. Step 2: Convert to fraction form
    21,253.91/31,714.80 = 19,040.18/x
  3. Step 3: Cross multiply
    21,253.91x = 31,714.80 × 19,040.18
  4. Step 4: Simplify right side
    21,253.91x = 603,855,270.69
  5. Step 5: Solve for x
    x = 603,855,270.69/21,253.91
  6. Step 6: Final answer
    x = 28,411.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.