Home / 42,808.20-64,219.16-13,219.08

Finding the Fourth Proportional to 42,808.20, 64,219.16 and 13,219.08

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Solution

The fourth proportional to 42,808.20, 64,219.16 and 13,219.08 is: 19,830.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,808.20 : 64,219.16 = 13,219.08 : x
  2. Step 2: Convert to fraction form
    42,808.20/64,219.16 = 13,219.08/x
  3. Step 3: Cross multiply
    42,808.20x = 64,219.16 × 13,219.08
  4. Step 4: Simplify right side
    42,808.20x = 848,918,213.57
  5. Step 5: Solve for x
    x = 848,918,213.57/42,808.20
  6. Step 6: Final answer
    x = 19,830.74

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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.