Home / 20,669.15-31,017.51-13,278.91

Finding the Fourth Proportional to 20,669.15, 31,017.51 and 13,278.91

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Solution

The fourth proportional to 20,669.15, 31,017.51 and 13,278.91 is: 19,927.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.15 : 31,017.51 = 13,278.91 : x
  2. Step 2: Convert to fraction form
    20,669.15/31,017.51 = 13,278.91/x
  3. Step 3: Cross multiply
    20,669.15x = 31,017.51 × 13,278.91
  4. Step 4: Simplify right side
    20,669.15x = 411,878,723.71
  5. Step 5: Solve for x
    x = 411,878,723.71/20,669.15
  6. Step 6: Final answer
    x = 19,927.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.