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Finding the Fourth Proportional to 18,712.01, 28,068.05 and 12,484.19

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Solution

The fourth proportional to 18,712.01, 28,068.05 and 12,484.19 is: 18,726.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.01 : 28,068.05 = 12,484.19 : x
  2. Step 2: Convert to fraction form
    18,712.01/28,068.05 = 12,484.19/x
  3. Step 3: Cross multiply
    18,712.01x = 28,068.05 × 12,484.19
  4. Step 4: Simplify right side
    18,712.01x = 350,406,970.51
  5. Step 5: Solve for x
    x = 350,406,970.51/18,712.01
  6. Step 6: Final answer
    x = 18,726.31

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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.