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Finding the Fourth Proportional to 30,985.57, 46,477.95 and 7,612.21

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Solution

The fourth proportional to 30,985.57, 46,477.95 and 7,612.21 is: 11,418.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.57 : 46,477.95 = 7,612.21 : x
  2. Step 2: Convert to fraction form
    30,985.57/46,477.95 = 7,612.21/x
  3. Step 3: Cross multiply
    30,985.57x = 46,477.95 × 7,612.21
  4. Step 4: Simplify right side
    30,985.57x = 353,799,915.77
  5. Step 5: Solve for x
    x = 353,799,915.77/30,985.57
  6. Step 6: Final answer
    x = 11,418.22

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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.