Home / 21,888.08-30,205.76-12,457.28

Finding the Fourth Proportional to 21,888.08, 30,205.76 and 12,457.28

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Solution

The fourth proportional to 21,888.08, 30,205.76 and 12,457.28 is: 17,191.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.08 : 30,205.76 = 12,457.28 : x
  2. Step 2: Convert to fraction form
    21,888.08/30,205.76 = 12,457.28/x
  3. Step 3: Cross multiply
    21,888.08x = 30,205.76 × 12,457.28
  4. Step 4: Simplify right side
    21,888.08x = 376,281,609.93
  5. Step 5: Solve for x
    x = 376,281,609.93/21,888.08
  6. Step 6: Final answer
    x = 17,191.17

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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.