Home / 18,875.48-28,316.64-7,776

Finding the Fourth Proportional to 18,875.48, 28,316.64 and 7,776

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Solution

The fourth proportional to 18,875.48, 28,316.64 and 7,776 is: 11,665.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.48 : 28,316.64 = 7,776 : x
  2. Step 2: Convert to fraction form
    18,875.48/28,316.64 = 7,776/x
  3. Step 3: Cross multiply
    18,875.48x = 28,316.64 × 7,776
  4. Step 4: Simplify right side
    18,875.48x = 220,190,173.20
  5. Step 5: Solve for x
    x = 220,190,173.20/18,875.48
  6. Step 6: Final answer
    x = 11,665.41

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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.