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Finding the Fourth Proportional to 18,312.66, 25,271.34 and 9,929.16

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Solution

The fourth proportional to 18,312.66, 25,271.34 and 9,929.16 is: 13,702.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,312.66 : 25,271.34 = 9,929.16 : x
  2. Step 2: Convert to fraction form
    18,312.66/25,271.34 = 9,929.16/x
  3. Step 3: Cross multiply
    18,312.66x = 25,271.34 × 9,929.16
  4. Step 4: Simplify right side
    18,312.66x = 250,923,178.27
  5. Step 5: Solve for x
    x = 250,923,178.27/18,312.66
  6. Step 6: Final answer
    x = 13,702.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.