Home / 15,301.86-21,111.16-9,999.75

Finding the Fourth Proportional to 15,301.86, 21,111.16 and 9,999.75

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Solution

The fourth proportional to 15,301.86, 21,111.16 and 9,999.75 is: 13,796.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,301.86 : 21,111.16 = 9,999.75 : x
  2. Step 2: Convert to fraction form
    15,301.86/21,111.16 = 9,999.75/x
  3. Step 3: Cross multiply
    15,301.86x = 21,111.16 × 9,999.75
  4. Step 4: Simplify right side
    15,301.86x = 211,106,367.00
  5. Step 5: Solve for x
    x = 211,106,367.00/15,301.86
  6. Step 6: Final answer
    x = 13,796.12

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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.