Home / 20,848.08-28,775.40-12,885.50

Finding the Fourth Proportional to 20,848.08, 28,775.40 and 12,885.50

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Solution

The fourth proportional to 20,848.08, 28,775.40 and 12,885.50 is: 17,785.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,848.08 : 28,775.40 = 12,885.50 : x
  2. Step 2: Convert to fraction form
    20,848.08/28,775.40 = 12,885.50/x
  3. Step 3: Cross multiply
    20,848.08x = 28,775.40 × 12,885.50
  4. Step 4: Simplify right side
    20,848.08x = 370,785,416.70
  5. Step 5: Solve for x
    x = 370,785,416.70/20,848.08
  6. Step 6: Final answer
    x = 17,785.11

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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.