Home / 27,815.30-38,387.84-15,880.41

Finding the Fourth Proportional to 27,815.30, 38,387.84 and 15,880.41

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Solution

The fourth proportional to 27,815.30, 38,387.84 and 15,880.41 is: 21,916.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,815.30 : 38,387.84 = 15,880.41 : x
  2. Step 2: Convert to fraction form
    27,815.30/38,387.84 = 15,880.41/x
  3. Step 3: Cross multiply
    27,815.30x = 38,387.84 × 15,880.41
  4. Step 4: Simplify right side
    27,815.30x = 609,614,558.81
  5. Step 5: Solve for x
    x = 609,614,558.81/27,815.30
  6. Step 6: Final answer
    x = 21,916.52

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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.