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Finding the Fourth Proportional to 15,802.88, 21,803.52 and 10,215.68

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Solution

The fourth proportional to 15,802.88, 21,803.52 and 10,215.68 is: 14,094.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,802.88 : 21,803.52 = 10,215.68 : x
  2. Step 2: Convert to fraction form
    15,802.88/21,803.52 = 10,215.68/x
  3. Step 3: Cross multiply
    15,802.88x = 21,803.52 × 10,215.68
  4. Step 4: Simplify right side
    15,802.88x = 222,737,783.19
  5. Step 5: Solve for x
    x = 222,737,783.19/15,802.88
  6. Step 6: Final answer
    x = 14,094.76

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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.