Home / 12,720.72-19,083.96-4,931.76

Finding the Fourth Proportional to 12,720.72, 19,083.96 and 4,931.76

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Solution

The fourth proportional to 12,720.72, 19,083.96 and 4,931.76 is: 7,398.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.72 : 19,083.96 = 4,931.76 : x
  2. Step 2: Convert to fraction form
    12,720.72/19,083.96 = 4,931.76/x
  3. Step 3: Cross multiply
    12,720.72x = 19,083.96 × 4,931.76
  4. Step 4: Simplify right side
    12,720.72x = 94,117,510.57
  5. Step 5: Solve for x
    x = 94,117,510.57/12,720.72
  6. Step 6: Final answer
    x = 7,398.76

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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.