Home / 12,840.14-17,718.80-7,539.50

Finding the Fourth Proportional to 12,840.14, 17,718.80 and 7,539.50

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Solution

The fourth proportional to 12,840.14, 17,718.80 and 7,539.50 is: 10,404.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.14 : 17,718.80 = 7,539.50 : x
  2. Step 2: Convert to fraction form
    12,840.14/17,718.80 = 7,539.50/x
  3. Step 3: Cross multiply
    12,840.14x = 17,718.80 × 7,539.50
  4. Step 4: Simplify right side
    12,840.14x = 133,590,892.60
  5. Step 5: Solve for x
    x = 133,590,892.60/12,840.14
  6. Step 6: Final answer
    x = 10,404.16

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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.