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Finding the Fourth Proportional to 39,289.70, 58,914.16 and 19,290.40

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Solution

The fourth proportional to 39,289.70, 58,914.16 and 19,290.40 is: 28,925.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.70 : 58,914.16 = 19,290.40 : x
  2. Step 2: Convert to fraction form
    39,289.70/58,914.16 = 19,290.40/x
  3. Step 3: Cross multiply
    39,289.70x = 58,914.16 × 19,290.40
  4. Step 4: Simplify right side
    39,289.70x = 1,136,477,712.06
  5. Step 5: Solve for x
    x = 1,136,477,712.06/39,289.70
  6. Step 6: Final answer
    x = 28,925.59

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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.