Home / 27,813.76-38,387.52-15,877.60

Finding the Fourth Proportional to 27,813.76, 38,387.52 and 15,877.60

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Solution

The fourth proportional to 27,813.76, 38,387.52 and 15,877.60 is: 21,913.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,813.76 : 38,387.52 = 15,877.60 : x
  2. Step 2: Convert to fraction form
    27,813.76/38,387.52 = 15,877.60/x
  3. Step 3: Cross multiply
    27,813.76x = 38,387.52 × 15,877.60
  4. Step 4: Simplify right side
    27,813.76x = 609,501,687.55
  5. Step 5: Solve for x
    x = 609,501,687.55/27,813.76
  6. Step 6: Final answer
    x = 21,913.67

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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.