Home / 14,221.51-19,617.80-9,978.93

Finding the Fourth Proportional to 14,221.51, 19,617.80 and 9,978.93

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Solution

The fourth proportional to 14,221.51, 19,617.80 and 9,978.93 is: 13,765.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,221.51 : 19,617.80 = 9,978.93 : x
  2. Step 2: Convert to fraction form
    14,221.51/19,617.80 = 9,978.93/x
  3. Step 3: Cross multiply
    14,221.51x = 19,617.80 × 9,978.93
  4. Step 4: Simplify right side
    14,221.51x = 195,764,603.06
  5. Step 5: Solve for x
    x = 195,764,603.06/14,221.51
  6. Step 6: Final answer
    x = 13,765.39

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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.