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Finding the Fourth Proportional to 10,365.20, 15,547.80 and 5,918.30

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Solution

The fourth proportional to 10,365.20, 15,547.80 and 5,918.30 is: 8,877.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,365.20 : 15,547.80 = 5,918.30 : x
  2. Step 2: Convert to fraction form
    10,365.20/15,547.80 = 5,918.30/x
  3. Step 3: Cross multiply
    10,365.20x = 15,547.80 × 5,918.30
  4. Step 4: Simplify right side
    10,365.20x = 92,016,544.74
  5. Step 5: Solve for x
    x = 92,016,544.74/10,365.20
  6. Step 6: Final answer
    x = 8,877.45

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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.