Home / 15,836.45-21,840.86-9,779.37

Finding the Fourth Proportional to 15,836.45, 21,840.86 and 9,779.37

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Solution

The fourth proportional to 15,836.45, 21,840.86 and 9,779.37 is: 13,487.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,836.45 : 21,840.86 = 9,779.37 : x
  2. Step 2: Convert to fraction form
    15,836.45/21,840.86 = 9,779.37/x
  3. Step 3: Cross multiply
    15,836.45x = 21,840.86 × 9,779.37
  4. Step 4: Simplify right side
    15,836.45x = 213,589,802.16
  5. Step 5: Solve for x
    x = 213,589,802.16/15,836.45
  6. Step 6: Final answer
    x = 13,487.23

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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.