Home / 20,779.45-31,147.63-9,677.00

Finding the Fourth Proportional to 20,779.45, 31,147.63 and 9,677.00

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Solution

The fourth proportional to 20,779.45, 31,147.63 and 9,677.00 is: 14,505.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.45 : 31,147.63 = 9,677.00 : x
  2. Step 2: Convert to fraction form
    20,779.45/31,147.63 = 9,677.00/x
  3. Step 3: Cross multiply
    20,779.45x = 31,147.63 × 9,677.00
  4. Step 4: Simplify right side
    20,779.45x = 301,415,669.19
  5. Step 5: Solve for x
    x = 301,415,669.19/20,779.45
  6. Step 6: Final answer
    x = 14,505.47

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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.