Home / 8,421.33-12,618-5,124.45

Finding the Fourth Proportional to 8,421.33, 12,618 and 5,124.45

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Solution

The fourth proportional to 8,421.33, 12,618 and 5,124.45 is: 7,678.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.33 : 12,618 = 5,124.45 : x
  2. Step 2: Convert to fraction form
    8,421.33/12,618 = 5,124.45/x
  3. Step 3: Cross multiply
    8,421.33x = 12,618 × 5,124.45
  4. Step 4: Simplify right side
    8,421.33x = 64,660,310.10
  5. Step 5: Solve for x
    x = 64,660,310.10/8,421.33
  6. Step 6: Final answer
    x = 7,678.16

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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.