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Finding the Fourth Proportional to 11,457.51, 15,812.03 and 6,421.49

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Solution

The fourth proportional to 11,457.51, 15,812.03 and 6,421.49 is: 8,862.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,457.51 : 15,812.03 = 6,421.49 : x
  2. Step 2: Convert to fraction form
    11,457.51/15,812.03 = 6,421.49/x
  3. Step 3: Cross multiply
    11,457.51x = 15,812.03 × 6,421.49
  4. Step 4: Simplify right side
    11,457.51x = 101,536,681.36
  5. Step 5: Solve for x
    x = 101,536,681.36/11,457.51
  6. Step 6: Final answer
    x = 8,862.02

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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.