Home / 8,418.12-11,618-4,881.45

Finding the Fourth Proportional to 8,418.12, 11,618 and 4,881.45

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Solution

The fourth proportional to 8,418.12, 11,618 and 4,881.45 is: 6,736.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.12 : 11,618 = 4,881.45 : x
  2. Step 2: Convert to fraction form
    8,418.12/11,618 = 4,881.45/x
  3. Step 3: Cross multiply
    8,418.12x = 11,618 × 4,881.45
  4. Step 4: Simplify right side
    8,418.12x = 56,712,686.10
  5. Step 5: Solve for x
    x = 56,712,686.10/8,418.12
  6. Step 6: Final answer
    x = 6,736.98

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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.