Home / 13,665.50-20,498.78-4,779.10

Finding the Fourth Proportional to 13,665.50, 20,498.78 and 4,779.10

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Solution

The fourth proportional to 13,665.50, 20,498.78 and 4,779.10 is: 7,168.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.50 : 20,498.78 = 4,779.10 : x
  2. Step 2: Convert to fraction form
    13,665.50/20,498.78 = 4,779.10/x
  3. Step 3: Cross multiply
    13,665.50x = 20,498.78 × 4,779.10
  4. Step 4: Simplify right side
    13,665.50x = 97,965,719.50
  5. Step 5: Solve for x
    x = 97,965,719.50/13,665.50
  6. Step 6: Final answer
    x = 7,168.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.