Home / 19,311.16-28,966.38-12,971.56

Finding the Fourth Proportional to 19,311.16, 28,966.38 and 12,971.56

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Solution

The fourth proportional to 19,311.16, 28,966.38 and 12,971.56 is: 19,457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.16 : 28,966.38 = 12,971.56 : x
  2. Step 2: Convert to fraction form
    19,311.16/28,966.38 = 12,971.56/x
  3. Step 3: Cross multiply
    19,311.16x = 28,966.38 × 12,971.56
  4. Step 4: Simplify right side
    19,311.16x = 375,739,136.15
  5. Step 5: Solve for x
    x = 375,739,136.15/19,311.16
  6. Step 6: Final answer
    x = 19,457.10

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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.