Home / 20,516.65-28,312.98-11,085.21

Finding the Fourth Proportional to 20,516.65, 28,312.98 and 11,085.21

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Solution

The fourth proportional to 20,516.65, 28,312.98 and 11,085.21 is: 15,297.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.65 : 28,312.98 = 11,085.21 : x
  2. Step 2: Convert to fraction form
    20,516.65/28,312.98 = 11,085.21/x
  3. Step 3: Cross multiply
    20,516.65x = 28,312.98 × 11,085.21
  4. Step 4: Simplify right side
    20,516.65x = 313,855,426.18
  5. Step 5: Solve for x
    x = 313,855,426.18/20,516.65
  6. Step 6: Final answer
    x = 15,297.60

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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.