Home / 20,969.17-28,937.08-11,409.19

Finding the Fourth Proportional to 20,969.17, 28,937.08 and 11,409.19

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Solution

The fourth proportional to 20,969.17, 28,937.08 and 11,409.19 is: 15,744.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.17 : 28,937.08 = 11,409.19 : x
  2. Step 2: Convert to fraction form
    20,969.17/28,937.08 = 11,409.19/x
  3. Step 3: Cross multiply
    20,969.17x = 28,937.08 × 11,409.19
  4. Step 4: Simplify right side
    20,969.17x = 330,148,643.77
  5. Step 5: Solve for x
    x = 330,148,643.77/20,969.17
  6. Step 6: Final answer
    x = 15,744.48

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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.