Home / 20,875.36-28,808.40-11,443.36

Finding the Fourth Proportional to 20,875.36, 28,808.40 and 11,443.36

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Solution

The fourth proportional to 20,875.36, 28,808.40 and 11,443.36 is: 15,792.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.36 : 28,808.40 = 11,443.36 : x
  2. Step 2: Convert to fraction form
    20,875.36/28,808.40 = 11,443.36/x
  3. Step 3: Cross multiply
    20,875.36x = 28,808.40 × 11,443.36
  4. Step 4: Simplify right side
    20,875.36x = 329,664,892.22
  5. Step 5: Solve for x
    x = 329,664,892.22/20,875.36
  6. Step 6: Final answer
    x = 15,792.06

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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.