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Finding the Fourth Proportional to 28,111.32, 42,166.98 and 9,643.48

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Solution

The fourth proportional to 28,111.32, 42,166.98 and 9,643.48 is: 14,465.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.32 : 42,166.98 = 9,643.48 : x
  2. Step 2: Convert to fraction form
    28,111.32/42,166.98 = 9,643.48/x
  3. Step 3: Cross multiply
    28,111.32x = 42,166.98 × 9,643.48
  4. Step 4: Simplify right side
    28,111.32x = 406,636,428.29
  5. Step 5: Solve for x
    x = 406,636,428.29/28,111.32
  6. Step 6: Final answer
    x = 14,465.22

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1.5x scale

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.