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Finding the Fourth Proportional to 39,430.80, 59,117.04 and 18,630

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Solution

The fourth proportional to 39,430.80, 59,117.04 and 18,630 is: 27,931.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,430.80 : 59,117.04 = 18,630 : x
  2. Step 2: Convert to fraction form
    39,430.80/59,117.04 = 18,630/x
  3. Step 3: Cross multiply
    39,430.80x = 59,117.04 × 18,630
  4. Step 4: Simplify right side
    39,430.80x = 1,101,350,455.20
  5. Step 5: Solve for x
    x = 1,101,350,455.20/39,430.80
  6. Step 6: Final answer
    x = 27,931.22

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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.