Home / 15,136.51-20,883.40-9,165.91

Finding the Fourth Proportional to 15,136.51, 20,883.40 and 9,165.91

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Solution

The fourth proportional to 15,136.51, 20,883.40 and 9,165.91 is: 12,645.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.51 : 20,883.40 = 9,165.91 : x
  2. Step 2: Convert to fraction form
    15,136.51/20,883.40 = 9,165.91/x
  3. Step 3: Cross multiply
    15,136.51x = 20,883.40 × 9,165.91
  4. Step 4: Simplify right side
    15,136.51x = 191,415,364.89
  5. Step 5: Solve for x
    x = 191,415,364.89/15,136.51
  6. Step 6: Final answer
    x = 12,645.94

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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.