Home / 21,784.14-30,071.27-14,720.13

Finding the Fourth Proportional to 21,784.14, 30,071.27 and 14,720.13

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Solution

The fourth proportional to 21,784.14, 30,071.27 and 14,720.13 is: 20,319.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,784.14 : 30,071.27 = 14,720.13 : x
  2. Step 2: Convert to fraction form
    21,784.14/30,071.27 = 14,720.13/x
  3. Step 3: Cross multiply
    21,784.14x = 30,071.27 × 14,720.13
  4. Step 4: Simplify right side
    21,784.14x = 442,653,040.47
  5. Step 5: Solve for x
    x = 442,653,040.47/21,784.14
  6. Step 6: Final answer
    x = 20,319.97

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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.