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Finding the Fourth Proportional to 14,628.40, 20,187.16 and 7,914.01

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Solution

The fourth proportional to 14,628.40, 20,187.16 and 7,914.01 is: 10,921.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,628.40 : 20,187.16 = 7,914.01 : x
  2. Step 2: Convert to fraction form
    14,628.40/20,187.16 = 7,914.01/x
  3. Step 3: Cross multiply
    14,628.40x = 20,187.16 × 7,914.01
  4. Step 4: Simplify right side
    14,628.40x = 159,761,386.11
  5. Step 5: Solve for x
    x = 159,761,386.11/14,628.40
  6. Step 6: Final answer
    x = 10,921.32

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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.