Home / 15,717.47-21,690.53-8,547.86

Finding the Fourth Proportional to 15,717.47, 21,690.53 and 8,547.86

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Solution

The fourth proportional to 15,717.47, 21,690.53 and 8,547.86 is: 11,796.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.47 : 21,690.53 = 8,547.86 : x
  2. Step 2: Convert to fraction form
    15,717.47/21,690.53 = 8,547.86/x
  3. Step 3: Cross multiply
    15,717.47x = 21,690.53 × 8,547.86
  4. Step 4: Simplify right side
    15,717.47x = 185,407,462.57
  5. Step 5: Solve for x
    x = 185,407,462.57/15,717.47
  6. Step 6: Final answer
    x = 11,796.27

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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.