Home / 11,457.20-15,810.50-6,421.47

Finding the Fourth Proportional to 11,457.20, 15,810.50 and 6,421.47

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Solution

The fourth proportional to 11,457.20, 15,810.50 and 6,421.47 is: 8,861.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,457.20 : 15,810.50 = 6,421.47 : x
  2. Step 2: Convert to fraction form
    11,457.20/15,810.50 = 6,421.47/x
  3. Step 3: Cross multiply
    11,457.20x = 15,810.50 × 6,421.47
  4. Step 4: Simplify right side
    11,457.20x = 101,526,572.38
  5. Step 5: Solve for x
    x = 101,526,572.38/11,457.20
  6. Step 6: Final answer
    x = 8,861.38

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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.