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Finding the Fourth Proportional to 14,774.51, 20,386.80 and 8,486.88

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Solution

The fourth proportional to 14,774.51, 20,386.80 and 8,486.88 is: 11,710.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,774.51 : 20,386.80 = 8,486.88 : x
  2. Step 2: Convert to fraction form
    14,774.51/20,386.80 = 8,486.88/x
  3. Step 3: Cross multiply
    14,774.51x = 20,386.80 × 8,486.88
  4. Step 4: Simplify right side
    14,774.51x = 173,020,325.18
  5. Step 5: Solve for x
    x = 173,020,325.18/14,774.51
  6. Step 6: Final answer
    x = 11,710.74

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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.