Home / 20,643.68-28,492.82-13,570.76

Finding the Fourth Proportional to 20,643.68, 28,492.82 and 13,570.76

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Solution

The fourth proportional to 20,643.68, 28,492.82 and 13,570.76 is: 18,730.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.68 : 28,492.82 = 13,570.76 : x
  2. Step 2: Convert to fraction form
    20,643.68/28,492.82 = 13,570.76/x
  3. Step 3: Cross multiply
    20,643.68x = 28,492.82 × 13,570.76
  4. Step 4: Simplify right side
    20,643.68x = 386,669,011.63
  5. Step 5: Solve for x
    x = 386,669,011.63/20,643.68
  6. Step 6: Final answer
    x = 18,730.63

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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.