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Finding the Fourth Proportional to 21,473.61, 29,627.51 and 13,920.25

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Solution

The fourth proportional to 21,473.61, 29,627.51 and 13,920.25 is: 19,206.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,473.61 : 29,627.51 = 13,920.25 : x
  2. Step 2: Convert to fraction form
    21,473.61/29,627.51 = 13,920.25/x
  3. Step 3: Cross multiply
    21,473.61x = 29,627.51 × 13,920.25
  4. Step 4: Simplify right side
    21,473.61x = 412,422,346.08
  5. Step 5: Solve for x
    x = 412,422,346.08/21,473.61
  6. Step 6: Final answer
    x = 19,206.01

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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.