Home / 20,639.34-30,987.36-10,652.45

Finding the Fourth Proportional to 20,639.34, 30,987.36 and 10,652.45

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Solution

The fourth proportional to 20,639.34, 30,987.36 and 10,652.45 is: 15,993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.34 : 30,987.36 = 10,652.45 : x
  2. Step 2: Convert to fraction form
    20,639.34/30,987.36 = 10,652.45/x
  3. Step 3: Cross multiply
    20,639.34x = 30,987.36 × 10,652.45
  4. Step 4: Simplify right side
    20,639.34x = 330,091,148.10
  5. Step 5: Solve for x
    x = 330,091,148.10/20,639.34
  6. Step 6: Final answer
    x = 15,993.30

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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.