Home / 18,756.40-28,138.56-7,069.72

Finding the Fourth Proportional to 18,756.40, 28,138.56 and 7,069.72

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Solution

The fourth proportional to 18,756.40, 28,138.56 and 7,069.72 is: 10,606.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.40 : 28,138.56 = 7,069.72 : x
  2. Step 2: Convert to fraction form
    18,756.40/28,138.56 = 7,069.72/x
  3. Step 3: Cross multiply
    18,756.40x = 28,138.56 × 7,069.72
  4. Step 4: Simplify right side
    18,756.40x = 198,931,740.40
  5. Step 5: Solve for x
    x = 198,931,740.40/18,756.40
  6. Step 6: Final answer
    x = 10,606.07

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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.