Home / 30,780.35-42,466.91-18,831.23

Finding the Fourth Proportional to 30,780.35, 42,466.91 and 18,831.23

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Solution

The fourth proportional to 30,780.35, 42,466.91 and 18,831.23 is: 25,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,780.35 : 42,466.91 = 18,831.23 : x
  2. Step 2: Convert to fraction form
    30,780.35/42,466.91 = 18,831.23/x
  3. Step 3: Cross multiply
    30,780.35x = 42,466.91 × 18,831.23
  4. Step 4: Simplify right side
    30,780.35x = 799,703,843.11
  5. Step 5: Solve for x
    x = 799,703,843.11/30,780.35
  6. Step 6: Final answer
    x = 25,980.99

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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.