Home / 15,731.03-21,709.14-8,657.47

Finding the Fourth Proportional to 15,731.03, 21,709.14 and 8,657.47

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Solution

The fourth proportional to 15,731.03, 21,709.14 and 8,657.47 is: 11,947.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.03 : 21,709.14 = 8,657.47 : x
  2. Step 2: Convert to fraction form
    15,731.03/21,709.14 = 8,657.47/x
  3. Step 3: Cross multiply
    15,731.03x = 21,709.14 × 8,657.47
  4. Step 4: Simplify right side
    15,731.03x = 187,946,228.28
  5. Step 5: Solve for x
    x = 187,946,228.28/15,731.03
  6. Step 6: Final answer
    x = 11,947.48

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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.