Home / 15,280.72-21,037.02-13,290.22

Finding the Fourth Proportional to 15,280.72, 21,037.02 and 13,290.22

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Solution

The fourth proportional to 15,280.72, 21,037.02 and 13,290.22 is: 18,296.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,280.72 : 21,037.02 = 13,290.22 : x
  2. Step 2: Convert to fraction form
    15,280.72/21,037.02 = 13,290.22/x
  3. Step 3: Cross multiply
    15,280.72x = 21,037.02 × 13,290.22
  4. Step 4: Simplify right side
    15,280.72x = 279,586,623.94
  5. Step 5: Solve for x
    x = 279,586,623.94/15,280.72
  6. Step 6: Final answer
    x = 18,296.69

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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.