Home / 18,726.50-25,783.61-15,887.99

Finding the Fourth Proportional to 18,726.50, 25,783.61 and 15,887.99

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Solution

The fourth proportional to 18,726.50, 25,783.61 and 15,887.99 is: 21,875.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.50 : 25,783.61 = 15,887.99 : x
  2. Step 2: Convert to fraction form
    18,726.50/25,783.61 = 15,887.99/x
  3. Step 3: Cross multiply
    18,726.50x = 25,783.61 × 15,887.99
  4. Step 4: Simplify right side
    18,726.50x = 409,649,529.49
  5. Step 5: Solve for x
    x = 409,649,529.49/18,726.50
  6. Step 6: Final answer
    x = 21,875.40

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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.