Home / 21,812.29-30,070.51-14,643.45

Finding the Fourth Proportional to 21,812.29, 30,070.51 and 14,643.45

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Solution

The fourth proportional to 21,812.29, 30,070.51 and 14,643.45 is: 20,187.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.29 : 30,070.51 = 14,643.45 : x
  2. Step 2: Convert to fraction form
    21,812.29/30,070.51 = 14,643.45/x
  3. Step 3: Cross multiply
    21,812.29x = 30,070.51 × 14,643.45
  4. Step 4: Simplify right side
    21,812.29x = 440,335,973.05
  5. Step 5: Solve for x
    x = 440,335,973.05/21,812.29
  6. Step 6: Final answer
    x = 20,187.52

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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.