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Finding the Fourth Proportional to 30,689.37, 42,337.02 and 19,933.47

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Solution

The fourth proportional to 30,689.37, 42,337.02 and 19,933.47 is: 27,498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.37 : 42,337.02 = 19,933.47 : x
  2. Step 2: Convert to fraction form
    30,689.37/42,337.02 = 19,933.47/x
  3. Step 3: Cross multiply
    30,689.37x = 42,337.02 × 19,933.47
  4. Step 4: Simplify right side
    30,689.37x = 843,923,718.06
  5. Step 5: Solve for x
    x = 843,923,718.06/30,689.37
  6. Step 6: Final answer
    x = 27,498.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.