Home / 42,688.35-64,041.75-13,108.59

Finding the Fourth Proportional to 42,688.35, 64,041.75 and 13,108.59

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Solution

The fourth proportional to 42,688.35, 64,041.75 and 13,108.59 is: 19,665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,688.35 : 64,041.75 = 13,108.59 : x
  2. Step 2: Convert to fraction form
    42,688.35/64,041.75 = 13,108.59/x
  3. Step 3: Cross multiply
    42,688.35x = 64,041.75 × 13,108.59
  4. Step 4: Simplify right side
    42,688.35x = 839,497,043.63
  5. Step 5: Solve for x
    x = 839,497,043.63/42,688.35
  6. Step 6: Final answer
    x = 19,665.72

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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.