Home / 28,238.70-38,967.71-15,663.45

Finding the Fourth Proportional to 28,238.70, 38,967.71 and 15,663.45

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Solution

The fourth proportional to 28,238.70, 38,967.71 and 15,663.45 is: 21,614.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.70 : 38,967.71 = 15,663.45 : x
  2. Step 2: Convert to fraction form
    28,238.70/38,967.71 = 15,663.45/x
  3. Step 3: Cross multiply
    28,238.70x = 38,967.71 × 15,663.45
  4. Step 4: Simplify right side
    28,238.70x = 610,368,698.88
  5. Step 5: Solve for x
    x = 610,368,698.88/28,238.70
  6. Step 6: Final answer
    x = 21,614.62

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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.