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Finding the Fourth Proportional to 39,400.77, 54,371.98 and 21,495.77

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Solution

The fourth proportional to 39,400.77, 54,371.98 and 21,495.77 is: 29,663.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,400.77 : 54,371.98 = 21,495.77 : x
  2. Step 2: Convert to fraction form
    39,400.77/54,371.98 = 21,495.77/x
  3. Step 3: Cross multiply
    39,400.77x = 54,371.98 × 21,495.77
  4. Step 4: Simplify right side
    39,400.77x = 1,168,767,576.52
  5. Step 5: Solve for x
    x = 1,168,767,576.52/39,400.77
  6. Step 6: Final answer
    x = 29,663.57

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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.