Home / 15,887.09-21,918.33-9,513.81

Finding the Fourth Proportional to 15,887.09, 21,918.33 and 9,513.81

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Solution

The fourth proportional to 15,887.09, 21,918.33 and 9,513.81 is: 13,125.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,887.09 : 21,918.33 = 9,513.81 : x
  2. Step 2: Convert to fraction form
    15,887.09/21,918.33 = 9,513.81/x
  3. Step 3: Cross multiply
    15,887.09x = 21,918.33 × 9,513.81
  4. Step 4: Simplify right side
    15,887.09x = 208,526,827.14
  5. Step 5: Solve for x
    x = 208,526,827.14/15,887.09
  6. Step 6: Final answer
    x = 13,125.55

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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.