Home / 21,707.46-29,947.32-13,206.51

Finding the Fourth Proportional to 21,707.46, 29,947.32 and 13,206.51

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Solution

The fourth proportional to 21,707.46, 29,947.32 and 13,206.51 is: 18,219.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,707.46 : 29,947.32 = 13,206.51 : x
  2. Step 2: Convert to fraction form
    21,707.46/29,947.32 = 13,206.51/x
  3. Step 3: Cross multiply
    21,707.46x = 29,947.32 × 13,206.51
  4. Step 4: Simplify right side
    21,707.46x = 395,499,581.05
  5. Step 5: Solve for x
    x = 395,499,581.05/21,707.46
  6. Step 6: Final answer
    x = 18,219.52

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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.