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Finding the Fourth Proportional to 18,897.59, 28,349.63 and 7,798.23

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Solution

The fourth proportional to 18,897.59, 28,349.63 and 7,798.23 is: 11,698.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.59 : 28,349.63 = 7,798.23 : x
  2. Step 2: Convert to fraction form
    18,897.59/28,349.63 = 7,798.23/x
  3. Step 3: Cross multiply
    18,897.59x = 28,349.63 × 7,798.23
  4. Step 4: Simplify right side
    18,897.59x = 221,076,896.16
  5. Step 5: Solve for x
    x = 221,076,896.16/18,897.59
  6. Step 6: Final answer
    x = 11,698.69

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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.