Home / 20,516.61-28,312.95-11,085.19

Finding the Fourth Proportional to 20,516.61, 28,312.95 and 11,085.19

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Solution

The fourth proportional to 20,516.61, 28,312.95 and 11,085.19 is: 15,297.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.61 : 28,312.95 = 11,085.19 : x
  2. Step 2: Convert to fraction form
    20,516.61/28,312.95 = 11,085.19/x
  3. Step 3: Cross multiply
    20,516.61x = 28,312.95 × 11,085.19
  4. Step 4: Simplify right side
    20,516.61x = 313,854,430.21
  5. Step 5: Solve for x
    x = 313,854,430.21/20,516.61
  6. Step 6: Final answer
    x = 15,297.58

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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.