Home / 21,784.19-30,071.37-14,720.18

Finding the Fourth Proportional to 21,784.19, 30,071.37 and 14,720.18

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Solution

The fourth proportional to 21,784.19, 30,071.37 and 14,720.18 is: 20,320.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,784.19 : 30,071.37 = 14,720.18 : x
  2. Step 2: Convert to fraction form
    21,784.19/30,071.37 = 14,720.18/x
  3. Step 3: Cross multiply
    21,784.19x = 30,071.37 × 14,720.18
  4. Step 4: Simplify right side
    21,784.19x = 442,655,979.25
  5. Step 5: Solve for x
    x = 442,655,979.25/21,784.19
  6. Step 6: Final answer
    x = 20,320.06

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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.