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Finding the Fourth Proportional to 15,567.76, 21,483.50 and 9,978.76

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Solution

The fourth proportional to 15,567.76, 21,483.50 and 9,978.76 is: 13,770.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,567.76 : 21,483.50 = 9,978.76 : x
  2. Step 2: Convert to fraction form
    15,567.76/21,483.50 = 9,978.76/x
  3. Step 3: Cross multiply
    15,567.76x = 21,483.50 × 9,978.76
  4. Step 4: Simplify right side
    15,567.76x = 214,378,690.46
  5. Step 5: Solve for x
    x = 214,378,690.46/15,567.76
  6. Step 6: Final answer
    x = 13,770.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.