Home / 20,479.69-30,720.35-5,688.69

Finding the Fourth Proportional to 20,479.69, 30,720.35 and 5,688.69

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Solution

The fourth proportional to 20,479.69, 30,720.35 and 5,688.69 is: 8,533.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.69 : 30,720.35 = 5,688.69 : x
  2. Step 2: Convert to fraction form
    20,479.69/30,720.35 = 5,688.69/x
  3. Step 3: Cross multiply
    20,479.69x = 30,720.35 × 5,688.69
  4. Step 4: Simplify right side
    20,479.69x = 174,758,547.84
  5. Step 5: Solve for x
    x = 174,758,547.84/20,479.69
  6. Step 6: Final answer
    x = 8,533.26

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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.