Home / 12,739.50-17,580.51-7,152.30

Finding the Fourth Proportional to 12,739.50, 17,580.51 and 7,152.30

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Solution

The fourth proportional to 12,739.50, 17,580.51 and 7,152.30 is: 9,870.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.50 : 17,580.51 = 7,152.30 : x
  2. Step 2: Convert to fraction form
    12,739.50/17,580.51 = 7,152.30/x
  3. Step 3: Cross multiply
    12,739.50x = 17,580.51 × 7,152.30
  4. Step 4: Simplify right side
    12,739.50x = 125,741,081.67
  5. Step 5: Solve for x
    x = 125,741,081.67/12,739.50
  6. Step 6: Final answer
    x = 9,870.17

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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.