Home / 20,323.16-28,055.55-15,289.30

Finding the Fourth Proportional to 20,323.16, 28,055.55 and 15,289.30

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Solution

The fourth proportional to 20,323.16, 28,055.55 and 15,289.30 is: 21,106.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,323.16 : 28,055.55 = 15,289.30 : x
  2. Step 2: Convert to fraction form
    20,323.16/28,055.55 = 15,289.30/x
  3. Step 3: Cross multiply
    20,323.16x = 28,055.55 × 15,289.30
  4. Step 4: Simplify right side
    20,323.16x = 428,949,720.62
  5. Step 5: Solve for x
    x = 428,949,720.62/20,323.16
  6. Step 6: Final answer
    x = 21,106.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.