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Finding the Fourth Proportional to 26,700.91, 40,050.99 and 7,980.53

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Solution

The fourth proportional to 26,700.91, 40,050.99 and 7,980.53 is: 11,970.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,700.91 : 40,050.99 = 7,980.53 : x
  2. Step 2: Convert to fraction form
    26,700.91/40,050.99 = 7,980.53/x
  3. Step 3: Cross multiply
    26,700.91x = 40,050.99 × 7,980.53
  4. Step 4: Simplify right side
    26,700.91x = 319,628,127.22
  5. Step 5: Solve for x
    x = 319,628,127.22/26,700.91
  6. Step 6: Final answer
    x = 11,970.68

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Double scale
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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.