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Finding the Fourth Proportional to 30,858.30, 46,287.45 and 8,672.40

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Solution

The fourth proportional to 30,858.30, 46,287.45 and 8,672.40 is: 13,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,858.30 : 46,287.45 = 8,672.40 : x
  2. Step 2: Convert to fraction form
    30,858.30/46,287.45 = 8,672.40/x
  3. Step 3: Cross multiply
    30,858.30x = 46,287.45 × 8,672.40
  4. Step 4: Simplify right side
    30,858.30x = 401,423,281.38
  5. Step 5: Solve for x
    x = 401,423,281.38/30,858.30
  6. Step 6: Final answer
    x = 13,008.60

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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.