Home / 39,970.39-59,962.79-19,990.30

Finding the Fourth Proportional to 39,970.39, 59,962.79 and 19,990.30

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Solution

The fourth proportional to 39,970.39, 59,962.79 and 19,990.30 is: 29,989.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,970.39 : 59,962.79 = 19,990.30 : x
  2. Step 2: Convert to fraction form
    39,970.39/59,962.79 = 19,990.30/x
  3. Step 3: Cross multiply
    39,970.39x = 59,962.79 × 19,990.30
  4. Step 4: Simplify right side
    39,970.39x = 1,198,674,160.94
  5. Step 5: Solve for x
    x = 1,198,674,160.94/39,970.39
  6. Step 6: Final answer
    x = 29,989.05

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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.