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Finding the Fourth Proportional to 28,462.66, 42,693.08 and 12,880.28

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Solution

The fourth proportional to 28,462.66, 42,693.08 and 12,880.28 is: 19,320.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,462.66 : 42,693.08 = 12,880.28 : x
  2. Step 2: Convert to fraction form
    28,462.66/42,693.08 = 12,880.28/x
  3. Step 3: Cross multiply
    28,462.66x = 42,693.08 × 12,880.28
  4. Step 4: Simplify right side
    28,462.66x = 549,898,866.79
  5. Step 5: Solve for x
    x = 549,898,866.79/28,462.66
  6. Step 6: Final answer
    x = 19,320.01

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