Home / 28,238.16-38,969.08-15,492.56

Finding the Fourth Proportional to 28,238.16, 38,969.08 and 15,492.56

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Solution

The fourth proportional to 28,238.16, 38,969.08 and 15,492.56 is: 21,379.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.16 : 38,969.08 = 15,492.56 : x
  2. Step 2: Convert to fraction form
    28,238.16/38,969.08 = 15,492.56/x
  3. Step 3: Cross multiply
    28,238.16x = 38,969.08 × 15,492.56
  4. Step 4: Simplify right side
    28,238.16x = 603,730,810.04
  5. Step 5: Solve for x
    x = 603,730,810.04/28,238.16
  6. Step 6: Final answer
    x = 21,379.96

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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.