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Finding the Fourth Proportional to 39,290.70, 58,915.66 and 19,291.40

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Solution

The fourth proportional to 39,290.70, 58,915.66 and 19,291.40 is: 28,927.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.70 : 58,915.66 = 19,291.40 : x
  2. Step 2: Convert to fraction form
    39,290.70/58,915.66 = 19,291.40/x
  3. Step 3: Cross multiply
    39,290.70x = 58,915.66 × 19,291.40
  4. Step 4: Simplify right side
    39,290.70x = 1,136,565,563.32
  5. Step 5: Solve for x
    x = 1,136,565,563.32/39,290.70
  6. Step 6: Final answer
    x = 28,927.09

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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.