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Finding the Fourth Proportional to 56,653.40, 84,988.20 and 19,215.20

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Solution

The fourth proportional to 56,653.40, 84,988.20 and 19,215.20 is: 28,825.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,653.40 : 84,988.20 = 19,215.20 : x
  2. Step 2: Convert to fraction form
    56,653.40/84,988.20 = 19,215.20/x
  3. Step 3: Cross multiply
    56,653.40x = 84,988.20 × 19,215.20
  4. Step 4: Simplify right side
    56,653.40x = 1,633,065,260.64
  5. Step 5: Solve for x
    x = 1,633,065,260.64/56,653.40
  6. Step 6: Final answer
    x = 28,825.55

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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.