Home / 15,880.35-21,897.83-13,389.90

Finding the Fourth Proportional to 15,880.35, 21,897.83 and 13,389.90

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Solution

The fourth proportional to 15,880.35, 21,897.83 and 13,389.90 is: 18,463.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.35 : 21,897.83 = 13,389.90 : x
  2. Step 2: Convert to fraction form
    15,880.35/21,897.83 = 13,389.90/x
  3. Step 3: Cross multiply
    15,880.35x = 21,897.83 × 13,389.90
  4. Step 4: Simplify right side
    15,880.35x = 293,209,686.97
  5. Step 5: Solve for x
    x = 293,209,686.97/15,880.35
  6. Step 6: Final answer
    x = 18,463.68

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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.