Home / 11,313.50-16,985.10-9,928.40

Finding the Fourth Proportional to 11,313.50, 16,985.10 and 9,928.40

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Solution

The fourth proportional to 11,313.50, 16,985.10 and 9,928.40 is: 14,905.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,313.50 : 16,985.10 = 9,928.40 : x
  2. Step 2: Convert to fraction form
    11,313.50/16,985.10 = 9,928.40/x
  3. Step 3: Cross multiply
    11,313.50x = 16,985.10 × 9,928.40
  4. Step 4: Simplify right side
    11,313.50x = 168,634,866.84
  5. Step 5: Solve for x
    x = 168,634,866.84/11,313.50
  6. Step 6: Final answer
    x = 14,905.63

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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.