Home / 20,820.51-28,689.80-14,839.47

Finding the Fourth Proportional to 20,820.51, 28,689.80 and 14,839.47

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Solution

The fourth proportional to 20,820.51, 28,689.80 and 14,839.47 is: 20,448.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.51 : 28,689.80 = 14,839.47 : x
  2. Step 2: Convert to fraction form
    20,820.51/28,689.80 = 14,839.47/x
  3. Step 3: Cross multiply
    20,820.51x = 28,689.80 × 14,839.47
  4. Step 4: Simplify right side
    20,820.51x = 425,741,352.21
  5. Step 5: Solve for x
    x = 425,741,352.21/20,820.51
  6. Step 6: Final answer
    x = 20,448.17

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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.