Home / 12,111.81-16,712.80-7,008.20

Finding the Fourth Proportional to 12,111.81, 16,712.80 and 7,008.20

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Solution

The fourth proportional to 12,111.81, 16,712.80 and 7,008.20 is: 9,670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,111.81 : 16,712.80 = 7,008.20 : x
  2. Step 2: Convert to fraction form
    12,111.81/16,712.80 = 7,008.20/x
  3. Step 3: Cross multiply
    12,111.81x = 16,712.80 × 7,008.20
  4. Step 4: Simplify right side
    12,111.81x = 117,126,700.56
  5. Step 5: Solve for x
    x = 117,126,700.56/12,111.81
  6. Step 6: Final answer
    x = 9,670.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.