Home / 28,972.64-39,969.38-18,898.76

Finding the Fourth Proportional to 28,972.64, 39,969.38 and 18,898.76

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Solution

The fourth proportional to 28,972.64, 39,969.38 and 18,898.76 is: 26,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,972.64 : 39,969.38 = 18,898.76 : x
  2. Step 2: Convert to fraction form
    28,972.64/39,969.38 = 18,898.76/x
  3. Step 3: Cross multiply
    28,972.64x = 39,969.38 × 18,898.76
  4. Step 4: Simplify right side
    28,972.64x = 755,371,867.14
  5. Step 5: Solve for x
    x = 755,371,867.14/28,972.64
  6. Step 6: Final answer
    x = 26,071.90

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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.