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Finding the Fourth Proportional to 28,907.68, 43,346.16 and 13,312

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Solution

The fourth proportional to 28,907.68, 43,346.16 and 13,312 is: 19,960.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,907.68 : 43,346.16 = 13,312 : x
  2. Step 2: Convert to fraction form
    28,907.68/43,346.16 = 13,312/x
  3. Step 3: Cross multiply
    28,907.68x = 43,346.16 × 13,312
  4. Step 4: Simplify right side
    28,907.68x = 577,024,081.92
  5. Step 5: Solve for x
    x = 577,024,081.92/28,907.68
  6. Step 6: Final answer
    x = 19,960.93

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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.