Home / 14,278.16-19,703.90-7,990.13

Finding the Fourth Proportional to 14,278.16, 19,703.90 and 7,990.13

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Solution

The fourth proportional to 14,278.16, 19,703.90 and 7,990.13 is: 11,026.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.16 : 19,703.90 = 7,990.13 : x
  2. Step 2: Convert to fraction form
    14,278.16/19,703.90 = 7,990.13/x
  3. Step 3: Cross multiply
    14,278.16x = 19,703.90 × 7,990.13
  4. Step 4: Simplify right side
    14,278.16x = 157,436,643.96
  5. Step 5: Solve for x
    x = 157,436,643.96/14,278.16
  6. Step 6: Final answer
    x = 11,026.40

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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.