Home / 15,710.94-21,681.25-8,637.51

Finding the Fourth Proportional to 15,710.94, 21,681.25 and 8,637.51

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Solution

The fourth proportional to 15,710.94, 21,681.25 and 8,637.51 is: 11,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.94 : 21,681.25 = 8,637.51 : x
  2. Step 2: Convert to fraction form
    15,710.94/21,681.25 = 8,637.51/x
  3. Step 3: Cross multiply
    15,710.94x = 21,681.25 × 8,637.51
  4. Step 4: Simplify right side
    15,710.94x = 187,272,013.69
  5. Step 5: Solve for x
    x = 187,272,013.69/15,710.94
  6. Step 6: Final answer
    x = 11,919.85

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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.