Home / 28,215.76-38,937.36-15,640.24

Finding the Fourth Proportional to 28,215.76, 38,937.36 and 15,640.24

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Solution

The fourth proportional to 28,215.76, 38,937.36 and 15,640.24 is: 21,583.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.76 : 38,937.36 = 15,640.24 : x
  2. Step 2: Convert to fraction form
    28,215.76/38,937.36 = 15,640.24/x
  3. Step 3: Cross multiply
    28,215.76x = 38,937.36 × 15,640.24
  4. Step 4: Simplify right side
    28,215.76x = 608,989,655.37
  5. Step 5: Solve for x
    x = 608,989,655.37/28,215.76
  6. Step 6: Final answer
    x = 21,583.32

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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.