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Finding the Fourth Proportional to 39,303.50, 54,238.50 and 21,398.46

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Solution

The fourth proportional to 39,303.50, 54,238.50 and 21,398.46 is: 29,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,303.50 : 54,238.50 = 21,398.46 : x
  2. Step 2: Convert to fraction form
    39,303.50/54,238.50 = 21,398.46/x
  3. Step 3: Cross multiply
    39,303.50x = 54,238.50 × 21,398.46
  4. Step 4: Simplify right side
    39,303.50x = 1,160,620,372.71
  5. Step 5: Solve for x
    x = 1,160,620,372.71/39,303.50
  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.