Home / 28,126.88-38,815.05-15,551.63

Finding the Fourth Proportional to 28,126.88, 38,815.05 and 15,551.63

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Solution

The fourth proportional to 28,126.88, 38,815.05 and 15,551.63 is: 21,461.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,126.88 : 38,815.05 = 15,551.63 : x
  2. Step 2: Convert to fraction form
    28,126.88/38,815.05 = 15,551.63/x
  3. Step 3: Cross multiply
    28,126.88x = 38,815.05 × 15,551.63
  4. Step 4: Simplify right side
    28,126.88x = 603,637,296.03
  5. Step 5: Solve for x
    x = 603,637,296.03/28,126.88
  6. Step 6: Final answer
    x = 21,461.22

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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.