Home / 15,349.74-21,185.67-9,978.84

Finding the Fourth Proportional to 15,349.74, 21,185.67 and 9,978.84

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Solution

The fourth proportional to 15,349.74, 21,185.67 and 9,978.84 is: 13,772.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,349.74 : 21,185.67 = 9,978.84 : x
  2. Step 2: Convert to fraction form
    15,349.74/21,185.67 = 9,978.84/x
  3. Step 3: Cross multiply
    15,349.74x = 21,185.67 × 9,978.84
  4. Step 4: Simplify right side
    15,349.74x = 211,408,411.22
  5. Step 5: Solve for x
    x = 211,408,411.22/15,349.74
  6. Step 6: Final answer
    x = 13,772.77

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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.