Home / 10,509.80-15,756.70-5,319.40

Finding the Fourth Proportional to 10,509.80, 15,756.70 and 5,319.40

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Solution

The fourth proportional to 10,509.80, 15,756.70 and 5,319.40 is: 7,975.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,509.80 : 15,756.70 = 5,319.40 : x
  2. Step 2: Convert to fraction form
    10,509.80/15,756.70 = 5,319.40/x
  3. Step 3: Cross multiply
    10,509.80x = 15,756.70 × 5,319.40
  4. Step 4: Simplify right side
    10,509.80x = 83,816,189.98
  5. Step 5: Solve for x
    x = 83,816,189.98/10,509.80
  6. Step 6: Final answer
    x = 7,975.05

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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.