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Finding the Fourth Proportional to 15,030.38, 20,739.59 and 8,657.24

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Solution

The fourth proportional to 15,030.38, 20,739.59 and 8,657.24 is: 11,945.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.38 : 20,739.59 = 8,657.24 : x
  2. Step 2: Convert to fraction form
    15,030.38/20,739.59 = 8,657.24/x
  3. Step 3: Cross multiply
    15,030.38x = 20,739.59 × 8,657.24
  4. Step 4: Simplify right side
    15,030.38x = 179,547,461.15
  5. Step 5: Solve for x
    x = 179,547,461.15/15,030.38
  6. Step 6: Final answer
    x = 11,945.64

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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.