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Finding the Fourth Proportional to 39,303.49, 54,238.49 and 21,398.46

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Solution

The fourth proportional to 39,303.49, 54,238.49 and 21,398.46 is: 29,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,303.49 : 54,238.49 = 21,398.46 : x
  2. Step 2: Convert to fraction form
    39,303.49/54,238.49 = 21,398.46/x
  3. Step 3: Cross multiply
    39,303.49x = 54,238.49 × 21,398.46
  4. Step 4: Simplify right side
    39,303.49x = 1,160,620,158.73
  5. Step 5: Solve for x
    x = 1,160,620,158.73/39,303.49
  6. Step 6: Final answer
    x = 29,529.70

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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.