Home / 15,319.90-21,140.67-8,605.81

Finding the Fourth Proportional to 15,319.90, 21,140.67 and 8,605.81

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Solution

The fourth proportional to 15,319.90, 21,140.67 and 8,605.81 is: 11,875.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.90 : 21,140.67 = 8,605.81 : x
  2. Step 2: Convert to fraction form
    15,319.90/21,140.67 = 8,605.81/x
  3. Step 3: Cross multiply
    15,319.90x = 21,140.67 × 8,605.81
  4. Step 4: Simplify right side
    15,319.90x = 181,932,589.29
  5. Step 5: Solve for x
    x = 181,932,589.29/15,319.90
  6. Step 6: Final answer
    x = 11,875.57

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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.