Home / 13,990.16-20,975.52-5,222.72

Finding the Fourth Proportional to 13,990.16, 20,975.52 and 5,222.72

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Solution

The fourth proportional to 13,990.16, 20,975.52 and 5,222.72 is: 7,830.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.16 : 20,975.52 = 5,222.72 : x
  2. Step 2: Convert to fraction form
    13,990.16/20,975.52 = 5,222.72/x
  3. Step 3: Cross multiply
    13,990.16x = 20,975.52 × 5,222.72
  4. Step 4: Simplify right side
    13,990.16x = 109,549,267.81
  5. Step 5: Solve for x
    x = 109,549,267.81/13,990.16
  6. Step 6: Final answer
    x = 7,830.45

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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.