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Finding the Fourth Proportional to 19,611.98, 29,430.48 and 7,130.81

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Solution

The fourth proportional to 19,611.98, 29,430.48 and 7,130.81 is: 10,700.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,611.98 : 29,430.48 = 7,130.81 : x
  2. Step 2: Convert to fraction form
    19,611.98/29,430.48 = 7,130.81/x
  3. Step 3: Cross multiply
    19,611.98x = 29,430.48 × 7,130.81
  4. Step 4: Simplify right side
    19,611.98x = 209,863,087.51
  5. Step 5: Solve for x
    x = 209,863,087.51/19,611.98
  6. Step 6: Final answer
    x = 10,700.76

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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.