Home / 30,763.50-42,443.91-18,820.86

Finding the Fourth Proportional to 30,763.50, 42,443.91 and 18,820.86

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Solution

The fourth proportional to 30,763.50, 42,443.91 and 18,820.86 is: 25,966.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,763.50 : 42,443.91 = 18,820.86 : x
  2. Step 2: Convert to fraction form
    30,763.50/42,443.91 = 18,820.86/x
  3. Step 3: Cross multiply
    30,763.50x = 42,443.91 × 18,820.86
  4. Step 4: Simplify right side
    30,763.50x = 798,830,887.96
  5. Step 5: Solve for x
    x = 798,830,887.96/30,763.50
  6. Step 6: Final answer
    x = 25,966.84

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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.