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Finding the Fourth Proportional to 15,094.76, 20,831.75 and 8,721.63

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Solution

The fourth proportional to 15,094.76, 20,831.75 and 8,721.63 is: 12,036.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,094.76 : 20,831.75 = 8,721.63 : x
  2. Step 2: Convert to fraction form
    15,094.76/20,831.75 = 8,721.63/x
  3. Step 3: Cross multiply
    15,094.76x = 20,831.75 × 8,721.63
  4. Step 4: Simplify right side
    15,094.76x = 181,686,772.14
  5. Step 5: Solve for x
    x = 181,686,772.14/15,094.76
  6. Step 6: Final answer
    x = 12,036.42

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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.