Home / 12,720.74-19,056.51-7,157.18

Finding the Fourth Proportional to 12,720.74, 19,056.51 and 7,157.18

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Solution

The fourth proportional to 12,720.74, 19,056.51 and 7,157.18 is: 10,721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.74 : 19,056.51 = 7,157.18 : x
  2. Step 2: Convert to fraction form
    12,720.74/19,056.51 = 7,157.18/x
  3. Step 3: Cross multiply
    12,720.74x = 19,056.51 × 7,157.18
  4. Step 4: Simplify right side
    12,720.74x = 136,390,872.24
  5. Step 5: Solve for x
    x = 136,390,872.24/12,720.74
  6. Step 6: Final answer
    x = 10,721.93

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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.