Home / 20,621.52-28,457.77-11,190.08

Finding the Fourth Proportional to 20,621.52, 28,457.77 and 11,190.08

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Solution

The fourth proportional to 20,621.52, 28,457.77 and 11,190.08 is: 15,442.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.52 : 28,457.77 = 11,190.08 : x
  2. Step 2: Convert to fraction form
    20,621.52/28,457.77 = 11,190.08/x
  3. Step 3: Cross multiply
    20,621.52x = 28,457.77 × 11,190.08
  4. Step 4: Simplify right side
    20,621.52x = 318,444,722.92
  5. Step 5: Solve for x
    x = 318,444,722.92/20,621.52
  6. Step 6: Final answer
    x = 15,442.35

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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.