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Finding the Fourth Proportional to 42,777.95, 64,172.95 and 13,198.19

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Solution

The fourth proportional to 42,777.95, 64,172.95 and 13,198.19 is: 19,799.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,777.95 : 64,172.95 = 13,198.19 : x
  2. Step 2: Convert to fraction form
    42,777.95/64,172.95 = 13,198.19/x
  3. Step 3: Cross multiply
    42,777.95x = 64,172.95 × 13,198.19
  4. Step 4: Simplify right side
    42,777.95x = 846,966,433.10
  5. Step 5: Solve for x
    x = 846,966,433.10/42,777.95
  6. Step 6: Final answer
    x = 19,799.14

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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.