Home / 39,139.48-54,012.60-21,234.63

Finding the Fourth Proportional to 39,139.48, 54,012.60 and 21,234.63

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Solution

The fourth proportional to 39,139.48, 54,012.60 and 21,234.63 is: 29,303.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.48 : 54,012.60 = 21,234.63 : x
  2. Step 2: Convert to fraction form
    39,139.48/54,012.60 = 21,234.63/x
  3. Step 3: Cross multiply
    39,139.48x = 54,012.60 × 21,234.63
  4. Step 4: Simplify right side
    39,139.48x = 1,146,937,496.71
  5. Step 5: Solve for x
    x = 1,146,937,496.71/39,139.48
  6. Step 6: Final answer
    x = 29,303.85

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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.