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Finding the Fourth Proportional to 58,653.40, 87,988.20 and 21,204.40

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Solution

The fourth proportional to 58,653.40, 87,988.20 and 21,204.40 is: 31,809.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,653.40 : 87,988.20 = 21,204.40 : x
  2. Step 2: Convert to fraction form
    58,653.40/87,988.20 = 21,204.40/x
  3. Step 3: Cross multiply
    58,653.40x = 87,988.20 × 21,204.40
  4. Step 4: Simplify right side
    58,653.40x = 1,865,736,988.08
  5. Step 5: Solve for x
    x = 1,865,736,988.08/58,653.40
  6. Step 6: Final answer
    x = 31,809.53

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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.