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Finding the Fourth Proportional to 42,749.84, 64,130.84 and 13,170.08

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Solution

The fourth proportional to 42,749.84, 64,130.84 and 13,170.08 is: 19,756.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,749.84 : 64,130.84 = 13,170.08 : x
  2. Step 2: Convert to fraction form
    42,749.84/64,130.84 = 13,170.08/x
  3. Step 3: Cross multiply
    42,749.84x = 64,130.84 × 13,170.08
  4. Step 4: Simplify right side
    42,749.84x = 844,608,293.27
  5. Step 5: Solve for x
    x = 844,608,293.27/42,749.84
  6. Step 6: Final answer
    x = 19,756.99

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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.