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Finding the Fourth Proportional to 14,395.12, 19,865.48 and 8,430.28

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Solution

The fourth proportional to 14,395.12, 19,865.48 and 8,430.28 is: 11,633.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,395.12 : 19,865.48 = 8,430.28 : x
  2. Step 2: Convert to fraction form
    14,395.12/19,865.48 = 8,430.28/x
  3. Step 3: Cross multiply
    14,395.12x = 19,865.48 × 8,430.28
  4. Step 4: Simplify right side
    14,395.12x = 167,471,558.73
  5. Step 5: Solve for x
    x = 167,471,558.73/14,395.12
  6. Step 6: Final answer
    x = 11,633.91

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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.