Home / 30,868.71-42,597.93-18,121.68

Finding the Fourth Proportional to 30,868.71, 42,597.93 and 18,121.68

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Solution

The fourth proportional to 30,868.71, 42,597.93 and 18,121.68 is: 25,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,868.71 : 42,597.93 = 18,121.68 : x
  2. Step 2: Convert to fraction form
    30,868.71/42,597.93 = 18,121.68/x
  3. Step 3: Cross multiply
    30,868.71x = 42,597.93 × 18,121.68
  4. Step 4: Simplify right side
    30,868.71x = 771,946,124.08
  5. Step 5: Solve for x
    x = 771,946,124.08/30,868.71
  6. Step 6: Final answer
    x = 25,007.40

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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.