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Finding the Fourth Proportional to 12,890.04, 19,328.76 and 5,492.76

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Solution

The fourth proportional to 12,890.04, 19,328.76 and 5,492.76 is: 8,236.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.04 : 19,328.76 = 5,492.76 : x
  2. Step 2: Convert to fraction form
    12,890.04/19,328.76 = 5,492.76/x
  3. Step 3: Cross multiply
    12,890.04x = 19,328.76 × 5,492.76
  4. Step 4: Simplify right side
    12,890.04x = 106,168,239.78
  5. Step 5: Solve for x
    x = 106,168,239.78/12,890.04
  6. Step 6: Final answer
    x = 8,236.46

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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.