Home / 20,690.02-28,547.91-13,530.43

Finding the Fourth Proportional to 20,690.02, 28,547.91 and 13,530.43

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Solution

The fourth proportional to 20,690.02, 28,547.91 and 13,530.43 is: 18,669.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.02 : 28,547.91 = 13,530.43 : x
  2. Step 2: Convert to fraction form
    20,690.02/28,547.91 = 13,530.43/x
  3. Step 3: Cross multiply
    20,690.02x = 28,547.91 × 13,530.43
  4. Step 4: Simplify right side
    20,690.02x = 386,265,497.90
  5. Step 5: Solve for x
    x = 386,265,497.90/20,690.02
  6. Step 6: Final answer
    x = 18,669.17

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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.