Home / 30,965.45-42,739.14-20,356.07

Finding the Fourth Proportional to 30,965.45, 42,739.14 and 20,356.07

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Solution

The fourth proportional to 30,965.45, 42,739.14 and 20,356.07 is: 28,095.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,965.45 : 42,739.14 = 20,356.07 : x
  2. Step 2: Convert to fraction form
    30,965.45/42,739.14 = 20,356.07/x
  3. Step 3: Cross multiply
    30,965.45x = 42,739.14 × 20,356.07
  4. Step 4: Simplify right side
    30,965.45x = 870,000,925.58
  5. Step 5: Solve for x
    x = 870,000,925.58/30,965.45
  6. Step 6: Final answer
    x = 28,095.86

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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.