Home / 12,420.98-17,148.61-8,547.05

Finding the Fourth Proportional to 12,420.98, 17,148.61 and 8,547.05

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Solution

The fourth proportional to 12,420.98, 17,148.61 and 8,547.05 is: 11,800.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.98 : 17,148.61 = 8,547.05 : x
  2. Step 2: Convert to fraction form
    12,420.98/17,148.61 = 8,547.05/x
  3. Step 3: Cross multiply
    12,420.98x = 17,148.61 × 8,547.05
  4. Step 4: Simplify right side
    12,420.98x = 146,570,027.10
  5. Step 5: Solve for x
    x = 146,570,027.10/12,420.98
  6. Step 6: Final answer
    x = 11,800.20

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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.