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Finding the Fourth Proportional to 21,036.84, 31,548.84 and 17,329.86

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Solution

The fourth proportional to 21,036.84, 31,548.84 and 17,329.86 is: 25,989.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.84 : 31,548.84 = 17,329.86 : x
  2. Step 2: Convert to fraction form
    21,036.84/31,548.84 = 17,329.86/x
  3. Step 3: Cross multiply
    21,036.84x = 31,548.84 × 17,329.86
  4. Step 4: Simplify right side
    21,036.84x = 546,736,980.36
  5. Step 5: Solve for x
    x = 546,736,980.36/21,036.84
  6. Step 6: Final answer
    x = 25,989.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.