Home / 39,988.16-60,018.81-20,280.32

Finding the Fourth Proportional to 39,988.16, 60,018.81 and 20,280.32

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Solution

The fourth proportional to 39,988.16, 60,018.81 and 20,280.32 is: 30,439.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,988.16 : 60,018.81 = 20,280.32 : x
  2. Step 2: Convert to fraction form
    39,988.16/60,018.81 = 20,280.32/x
  3. Step 3: Cross multiply
    39,988.16x = 60,018.81 × 20,280.32
  4. Step 4: Simplify right side
    39,988.16x = 1,217,200,672.82
  5. Step 5: Solve for x
    x = 1,217,200,672.82/39,988.16
  6. Step 6: Final answer
    x = 30,439.03

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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.