Home / 15,302.76-21,118.50-11,985

Finding the Fourth Proportional to 15,302.76, 21,118.50 and 11,985

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Solution

The fourth proportional to 15,302.76, 21,118.50 and 11,985 is: 16,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,302.76 : 21,118.50 = 11,985 : x
  2. Step 2: Convert to fraction form
    15,302.76/21,118.50 = 11,985/x
  3. Step 3: Cross multiply
    15,302.76x = 21,118.50 × 11,985
  4. Step 4: Simplify right side
    15,302.76x = 253,105,222.50
  5. Step 5: Solve for x
    x = 253,105,222.50/15,302.76
  6. Step 6: Final answer
    x = 16,539.84

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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.