Home / 13,127.84-18,140.16-9,978.56

Finding the Fourth Proportional to 13,127.84, 18,140.16 and 9,978.56

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Solution

The fourth proportional to 13,127.84, 18,140.16 and 9,978.56 is: 13,788.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.84 : 18,140.16 = 9,978.56 : x
  2. Step 2: Convert to fraction form
    13,127.84/18,140.16 = 9,978.56/x
  3. Step 3: Cross multiply
    13,127.84x = 18,140.16 × 9,978.56
  4. Step 4: Simplify right side
    13,127.84x = 181,012,674.97
  5. Step 5: Solve for x
    x = 181,012,674.97/13,127.84
  6. Step 6: Final answer
    x = 13,788.46

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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.