Home / 13,990.65-21,062.58-12,765.93

Finding the Fourth Proportional to 13,990.65, 21,062.58 and 12,765.93

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Solution

The fourth proportional to 13,990.65, 21,062.58 and 12,765.93 is: 19,218.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.65 : 21,062.58 = 12,765.93 : x
  2. Step 2: Convert to fraction form
    13,990.65/21,062.58 = 12,765.93/x
  3. Step 3: Cross multiply
    13,990.65x = 21,062.58 × 12,765.93
  4. Step 4: Simplify right side
    13,990.65x = 268,883,421.90
  5. Step 5: Solve for x
    x = 268,883,421.90/13,990.65
  6. Step 6: Final answer
    x = 19,218.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.