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Finding the Fourth Proportional to 28,695.51, 43,041.65 and 8,971.74

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Solution

The fourth proportional to 28,695.51, 43,041.65 and 8,971.74 is: 13,457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,695.51 : 43,041.65 = 8,971.74 : x
  2. Step 2: Convert to fraction form
    28,695.51/43,041.65 = 8,971.74/x
  3. Step 3: Cross multiply
    28,695.51x = 43,041.65 × 8,971.74
  4. Step 4: Simplify right side
    28,695.51x = 386,158,448.11
  5. Step 5: Solve for x
    x = 386,158,448.11/28,695.51
  6. Step 6: Final answer
    x = 13,457.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.