Home / 31,426.80-43,389.12-19,507.68

Finding the Fourth Proportional to 31,426.80, 43,389.12 and 19,507.68

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Solution

The fourth proportional to 31,426.80, 43,389.12 and 19,507.68 is: 26,933.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,426.80 : 43,389.12 = 19,507.68 : x
  2. Step 2: Convert to fraction form
    31,426.80/43,389.12 = 19,507.68/x
  3. Step 3: Cross multiply
    31,426.80x = 43,389.12 × 19,507.68
  4. Step 4: Simplify right side
    31,426.80x = 846,421,068.44
  5. Step 5: Solve for x
    x = 846,421,068.44/31,426.80
  6. Step 6: Final answer
    x = 26,933.10

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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.