Home / 21,188.51-31,790.06-9,509.93

Finding the Fourth Proportional to 21,188.51, 31,790.06 and 9,509.93

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Solution

The fourth proportional to 21,188.51, 31,790.06 and 9,509.93 is: 14,268.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.51 : 31,790.06 = 9,509.93 : x
  2. Step 2: Convert to fraction form
    21,188.51/31,790.06 = 9,509.93/x
  3. Step 3: Cross multiply
    21,188.51x = 31,790.06 × 9,509.93
  4. Step 4: Simplify right side
    21,188.51x = 302,321,038.80
  5. Step 5: Solve for x
    x = 302,321,038.80/21,188.51
  6. Step 6: Final answer
    x = 14,268.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.