Home / 20,643.30-28,492.30-13,570.38

Finding the Fourth Proportional to 20,643.30, 28,492.30 and 13,570.38

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Solution

The fourth proportional to 20,643.30, 28,492.30 and 13,570.38 is: 18,730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.30 : 28,492.30 = 13,570.38 : x
  2. Step 2: Convert to fraction form
    20,643.30/28,492.30 = 13,570.38/x
  3. Step 3: Cross multiply
    20,643.30x = 28,492.30 × 13,570.38
  4. Step 4: Simplify right side
    20,643.30x = 386,651,338.07
  5. Step 5: Solve for x
    x = 386,651,338.07/20,643.30
  6. Step 6: Final answer
    x = 18,730.11

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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.