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Finding the Fourth Proportional to 15,808.74, 21,803.76 and 11,207.40

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Solution

The fourth proportional to 15,808.74, 21,803.76 and 11,207.40 is: 15,457.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.74 : 21,803.76 = 11,207.40 : x
  2. Step 2: Convert to fraction form
    15,808.74/21,803.76 = 11,207.40/x
  3. Step 3: Cross multiply
    15,808.74x = 21,803.76 × 11,207.40
  4. Step 4: Simplify right side
    15,808.74x = 244,363,459.82
  5. Step 5: Solve for x
    x = 244,363,459.82/15,808.74
  6. Step 6: Final answer
    x = 15,457.49

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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.