Home / 28,213.04-38,935.32-15,638

Finding the Fourth Proportional to 28,213.04, 38,935.32 and 15,638

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Solution

The fourth proportional to 28,213.04, 38,935.32 and 15,638 is: 21,581.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.04 : 38,935.32 = 15,638 : x
  2. Step 2: Convert to fraction form
    28,213.04/38,935.32 = 15,638/x
  3. Step 3: Cross multiply
    28,213.04x = 38,935.32 × 15,638
  4. Step 4: Simplify right side
    28,213.04x = 608,870,534.16
  5. Step 5: Solve for x
    x = 608,870,534.16/28,213.04
  6. Step 6: Final answer
    x = 21,581.17

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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.