Home / 20,988.23-28,954.57-13,808.92

Finding the Fourth Proportional to 20,988.23, 28,954.57 and 13,808.92

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Solution

The fourth proportional to 20,988.23, 28,954.57 and 13,808.92 is: 19,050.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.23 : 28,954.57 = 13,808.92 : x
  2. Step 2: Convert to fraction form
    20,988.23/28,954.57 = 13,808.92/x
  3. Step 3: Cross multiply
    20,988.23x = 28,954.57 × 13,808.92
  4. Step 4: Simplify right side
    20,988.23x = 399,831,340.76
  5. Step 5: Solve for x
    x = 399,831,340.76/20,988.23
  6. Step 6: Final answer
    x = 19,050.26

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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.