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Finding the Fourth Proportional to 19,989.81, 27,587.75 and 12,030.75

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Solution

The fourth proportional to 19,989.81, 27,587.75 and 12,030.75 is: 16,603.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.81 : 27,587.75 = 12,030.75 : x
  2. Step 2: Convert to fraction form
    19,989.81/27,587.75 = 12,030.75/x
  3. Step 3: Cross multiply
    19,989.81x = 27,587.75 × 12,030.75
  4. Step 4: Simplify right side
    19,989.81x = 331,901,263.16
  5. Step 5: Solve for x
    x = 331,901,263.16/19,989.81
  6. Step 6: Final answer
    x = 16,603.52

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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.