Home / 39,988.40-60,019.50-20,280.79

Finding the Fourth Proportional to 39,988.40, 60,019.50 and 20,280.79

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Solution

The fourth proportional to 39,988.40, 60,019.50 and 20,280.79 is: 30,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,988.40 : 60,019.50 = 20,280.79 : x
  2. Step 2: Convert to fraction form
    39,988.40/60,019.50 = 20,280.79/x
  3. Step 3: Cross multiply
    39,988.40x = 60,019.50 × 20,280.79
  4. Step 4: Simplify right side
    39,988.40x = 1,217,242,875.41
  5. Step 5: Solve for x
    x = 1,217,242,875.41/39,988.40
  6. Step 6: Final answer
    x = 30,439.90

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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.