Home / 12,971.72-19,437.66-8,739.20

Finding the Fourth Proportional to 12,971.72, 19,437.66 and 8,739.20

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Solution

The fourth proportional to 12,971.72, 19,437.66 and 8,739.20 is: 13,095.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.72 : 19,437.66 = 8,739.20 : x
  2. Step 2: Convert to fraction form
    12,971.72/19,437.66 = 8,739.20/x
  3. Step 3: Cross multiply
    12,971.72x = 19,437.66 × 8,739.20
  4. Step 4: Simplify right side
    12,971.72x = 169,869,501.08
  5. Step 5: Solve for x
    x = 169,869,501.08/12,971.72
  6. Step 6: Final answer
    x = 13,095.38

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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.