Home / 30,779.60-42,465.87-18,830.48

Finding the Fourth Proportional to 30,779.60, 42,465.87 and 18,830.48

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Solution

The fourth proportional to 30,779.60, 42,465.87 and 18,830.48 is: 25,979.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,779.60 : 42,465.87 = 18,830.48 : x
  2. Step 2: Convert to fraction form
    30,779.60/42,465.87 = 18,830.48/x
  3. Step 3: Cross multiply
    30,779.60x = 42,465.87 × 18,830.48
  4. Step 4: Simplify right side
    30,779.60x = 799,652,503.39
  5. Step 5: Solve for x
    x = 799,652,503.39/30,779.60
  6. Step 6: Final answer
    x = 25,979.96

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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.