Home / 20,647.80-28,492.56-11,216.16

Finding the Fourth Proportional to 20,647.80, 28,492.56 and 11,216.16

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Solution

The fourth proportional to 20,647.80, 28,492.56 and 11,216.16 is: 15,477.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.80 : 28,492.56 = 11,216.16 : x
  2. Step 2: Convert to fraction form
    20,647.80/28,492.56 = 11,216.16/x
  3. Step 3: Cross multiply
    20,647.80x = 28,492.56 × 11,216.16
  4. Step 4: Simplify right side
    20,647.80x = 319,577,111.77
  5. Step 5: Solve for x
    x = 319,577,111.77/20,647.80
  6. Step 6: Final answer
    x = 15,477.54

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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.