Home / 30,540.81-45,779.24-12,781.64

Finding the Fourth Proportional to 30,540.81, 45,779.24 and 12,781.64

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Solution

The fourth proportional to 30,540.81, 45,779.24 and 12,781.64 is: 19,159.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,540.81 : 45,779.24 = 12,781.64 : x
  2. Step 2: Convert to fraction form
    30,540.81/45,779.24 = 12,781.64/x
  3. Step 3: Cross multiply
    30,540.81x = 45,779.24 × 12,781.64
  4. Step 4: Simplify right side
    30,540.81x = 585,133,701.25
  5. Step 5: Solve for x
    x = 585,133,701.25/30,540.81
  6. Step 6: Final answer
    x = 19,159.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.