Home / 28,491.88-39,320.34-15,916.60

Finding the Fourth Proportional to 28,491.88, 39,320.34 and 15,916.60

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Solution

The fourth proportional to 28,491.88, 39,320.34 and 15,916.60 is: 21,965.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.88 : 39,320.34 = 15,916.60 : x
  2. Step 2: Convert to fraction form
    28,491.88/39,320.34 = 15,916.60/x
  3. Step 3: Cross multiply
    28,491.88x = 39,320.34 × 15,916.60
  4. Step 4: Simplify right side
    28,491.88x = 625,846,123.64
  5. Step 5: Solve for x
    x = 625,846,123.64/28,491.88
  6. Step 6: Final answer
    x = 21,965.77

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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.