Home / 15,855.07-21,830.20-13,460.07

Finding the Fourth Proportional to 15,855.07, 21,830.20 and 13,460.07

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Solution

The fourth proportional to 15,855.07, 21,830.20 and 13,460.07 is: 18,532.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.07 : 21,830.20 = 13,460.07 : x
  2. Step 2: Convert to fraction form
    15,855.07/21,830.20 = 13,460.07/x
  3. Step 3: Cross multiply
    15,855.07x = 21,830.20 × 13,460.07
  4. Step 4: Simplify right side
    15,855.07x = 293,836,020.11
  5. Step 5: Solve for x
    x = 293,836,020.11/15,855.07
  6. Step 6: Final answer
    x = 18,532.62

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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.