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Finding the Fourth Proportional to 27,312.96, 40,986.48 and 9,782.40

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Solution

The fourth proportional to 27,312.96, 40,986.48 and 9,782.40 is: 14,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,312.96 : 40,986.48 = 9,782.40 : x
  2. Step 2: Convert to fraction form
    27,312.96/40,986.48 = 9,782.40/x
  3. Step 3: Cross multiply
    27,312.96x = 40,986.48 × 9,782.40
  4. Step 4: Simplify right side
    27,312.96x = 400,946,141.95
  5. Step 5: Solve for x
    x = 400,946,141.95/27,312.96
  6. Step 6: Final answer
    x = 14,679.70

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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.