Home / 15,492.06-21,378.68-8,685.63

Finding the Fourth Proportional to 15,492.06, 21,378.68 and 8,685.63

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Solution

The fourth proportional to 15,492.06, 21,378.68 and 8,685.63 is: 11,985.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.06 : 21,378.68 = 8,685.63 : x
  2. Step 2: Convert to fraction form
    15,492.06/21,378.68 = 8,685.63/x
  3. Step 3: Cross multiply
    15,492.06x = 21,378.68 × 8,685.63
  4. Step 4: Simplify right side
    15,492.06x = 185,687,342.37
  5. Step 5: Solve for x
    x = 185,687,342.37/15,492.06
  6. Step 6: Final answer
    x = 11,985.97

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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.