Home / 15,492.32-21,378.70-8,777.80

Finding the Fourth Proportional to 15,492.32, 21,378.70 and 8,777.80

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Solution

The fourth proportional to 15,492.32, 21,378.70 and 8,777.80 is: 12,112.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.32 : 21,378.70 = 8,777.80 : x
  2. Step 2: Convert to fraction form
    15,492.32/21,378.70 = 8,777.80/x
  3. Step 3: Cross multiply
    15,492.32x = 21,378.70 × 8,777.80
  4. Step 4: Simplify right side
    15,492.32x = 187,657,952.86
  5. Step 5: Solve for x
    x = 187,657,952.86/15,492.32
  6. Step 6: Final answer
    x = 12,112.97

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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.