Home / 30,975.16-42,752.52-20,365.80

Finding the Fourth Proportional to 30,975.16, 42,752.52 and 20,365.80

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Solution

The fourth proportional to 30,975.16, 42,752.52 and 20,365.80 is: 28,109.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,975.16 : 42,752.52 = 20,365.80 : x
  2. Step 2: Convert to fraction form
    30,975.16/42,752.52 = 20,365.80/x
  3. Step 3: Cross multiply
    30,975.16x = 42,752.52 × 20,365.80
  4. Step 4: Simplify right side
    30,975.16x = 870,689,271.82
  5. Step 5: Solve for x
    x = 870,689,271.82/30,975.16
  6. Step 6: Final answer
    x = 28,109.27

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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.