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Finding the Fourth Proportional to 14,985, 20,679.30 and 8,700.84

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Solution

The fourth proportional to 14,985, 20,679.30 and 8,700.84 is: 12,007.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,985 : 20,679.30 = 8,700.84 : x
  2. Step 2: Convert to fraction form
    14,985/20,679.30 = 8,700.84/x
  3. Step 3: Cross multiply
    14,985x = 20,679.30 × 8,700.84
  4. Step 4: Simplify right side
    14,985x = 179,927,280.61
  5. Step 5: Solve for x
    x = 179,927,280.61/14,985
  6. Step 6: Final answer
    x = 12,007.16

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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.