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Finding the Fourth Proportional to 21,904.52, 30,228.04 and 12,347.47

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Solution

The fourth proportional to 21,904.52, 30,228.04 and 12,347.47 is: 17,039.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.52 : 30,228.04 = 12,347.47 : x
  2. Step 2: Convert to fraction form
    21,904.52/30,228.04 = 12,347.47/x
  3. Step 3: Cross multiply
    21,904.52x = 30,228.04 × 12,347.47
  4. Step 4: Simplify right side
    21,904.52x = 373,239,710.62
  5. Step 5: Solve for x
    x = 373,239,710.62/21,904.52
  6. Step 6: Final answer
    x = 17,039.40

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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.