Home / 12,779.49-17,630.80-9,430.30

Finding the Fourth Proportional to 12,779.49, 17,630.80 and 9,430.30

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Solution

The fourth proportional to 12,779.49, 17,630.80 and 9,430.30 is: 13,010.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.49 : 17,630.80 = 9,430.30 : x
  2. Step 2: Convert to fraction form
    12,779.49/17,630.80 = 9,430.30/x
  3. Step 3: Cross multiply
    12,779.49x = 17,630.80 × 9,430.30
  4. Step 4: Simplify right side
    12,779.49x = 166,263,733.24
  5. Step 5: Solve for x
    x = 166,263,733.24/12,779.49
  6. Step 6: Final answer
    x = 13,010.20

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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.