Home / 20,862.08-28,782.48-11,903.12

Finding the Fourth Proportional to 20,862.08, 28,782.48 and 11,903.12

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Solution

The fourth proportional to 20,862.08, 28,782.48 and 11,903.12 is: 16,422.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.08 : 28,782.48 = 11,903.12 : x
  2. Step 2: Convert to fraction form
    20,862.08/28,782.48 = 11,903.12/x
  3. Step 3: Cross multiply
    20,862.08x = 28,782.48 × 11,903.12
  4. Step 4: Simplify right side
    20,862.08x = 342,601,313.34
  5. Step 5: Solve for x
    x = 342,601,313.34/20,862.08
  6. Step 6: Final answer
    x = 16,422.20

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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.