Home / 20,886.70-28,823.68-11,455.32

Finding the Fourth Proportional to 20,886.70, 28,823.68 and 11,455.32

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Solution

The fourth proportional to 20,886.70, 28,823.68 and 11,455.32 is: 15,808.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.70 : 28,823.68 = 11,455.32 : x
  2. Step 2: Convert to fraction form
    20,886.70/28,823.68 = 11,455.32/x
  3. Step 3: Cross multiply
    20,886.70x = 28,823.68 × 11,455.32
  4. Step 4: Simplify right side
    20,886.70x = 330,184,477.98
  5. Step 5: Solve for x
    x = 330,184,477.98/20,886.70
  6. Step 6: Final answer
    x = 15,808.36

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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.