Home / 12,390.03-17,099.70-7,085.88

Finding the Fourth Proportional to 12,390.03, 17,099.70 and 7,085.88

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Solution

The fourth proportional to 12,390.03, 17,099.70 and 7,085.88 is: 9,779.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.03 : 17,099.70 = 7,085.88 : x
  2. Step 2: Convert to fraction form
    12,390.03/17,099.70 = 7,085.88/x
  3. Step 3: Cross multiply
    12,390.03x = 17,099.70 × 7,085.88
  4. Step 4: Simplify right side
    12,390.03x = 121,166,422.24
  5. Step 5: Solve for x
    x = 121,166,422.24/12,390.03
  6. Step 6: Final answer
    x = 9,779.35

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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.