Home / 39,740.78-59,639.18-18,681.78

Finding the Fourth Proportional to 39,740.78, 59,639.18 and 18,681.78

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Solution

The fourth proportional to 39,740.78, 59,639.18 and 18,681.78 is: 28,035.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,740.78 : 59,639.18 = 18,681.78 : x
  2. Step 2: Convert to fraction form
    39,740.78/59,639.18 = 18,681.78/x
  3. Step 3: Cross multiply
    39,740.78x = 59,639.18 × 18,681.78
  4. Step 4: Simplify right side
    39,740.78x = 1,114,166,040.14
  5. Step 5: Solve for x
    x = 1,114,166,040.14/39,740.78
  6. Step 6: Final answer
    x = 28,035.84

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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.