Home / 15,271.62-21,085.16-9,895.65

Finding the Fourth Proportional to 15,271.62, 21,085.16 and 9,895.65

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Solution

The fourth proportional to 15,271.62, 21,085.16 and 9,895.65 is: 13,662.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,271.62 : 21,085.16 = 9,895.65 : x
  2. Step 2: Convert to fraction form
    15,271.62/21,085.16 = 9,895.65/x
  3. Step 3: Cross multiply
    15,271.62x = 21,085.16 × 9,895.65
  4. Step 4: Simplify right side
    15,271.62x = 208,651,314.08
  5. Step 5: Solve for x
    x = 208,651,314.08/15,271.62
  6. Step 6: Final answer
    x = 13,662.68

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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.