Home / 15,739.07-21,720.29-8,569.35

Finding the Fourth Proportional to 15,739.07, 21,720.29 and 8,569.35

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Solution

The fourth proportional to 15,739.07, 21,720.29 and 8,569.35 is: 11,825.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.07 : 21,720.29 = 8,569.35 : x
  2. Step 2: Convert to fraction form
    15,739.07/21,720.29 = 8,569.35/x
  3. Step 3: Cross multiply
    15,739.07x = 21,720.29 × 8,569.35
  4. Step 4: Simplify right side
    15,739.07x = 186,128,724.26
  5. Step 5: Solve for x
    x = 186,128,724.26/15,739.07
  6. Step 6: Final answer
    x = 11,825.91

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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.