Home / 15,681.53-21,640.29-8,607.98

Finding the Fourth Proportional to 15,681.53, 21,640.29 and 8,607.98

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Solution

The fourth proportional to 15,681.53, 21,640.29 and 8,607.98 is: 11,878.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.53 : 21,640.29 = 8,607.98 : x
  2. Step 2: Convert to fraction form
    15,681.53/21,640.29 = 8,607.98/x
  3. Step 3: Cross multiply
    15,681.53x = 21,640.29 × 8,607.98
  4. Step 4: Simplify right side
    15,681.53x = 186,279,183.51
  5. Step 5: Solve for x
    x = 186,279,183.51/15,681.53
  6. Step 6: Final answer
    x = 11,878.89

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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.