Home / 5,640.96-7,779.78-4,312.20

Finding the Fourth Proportional to 5,640.96, 7,779.78 and 4,312.20

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Solution

The fourth proportional to 5,640.96, 7,779.78 and 4,312.20 is: 5,947.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.96 : 7,779.78 = 4,312.20 : x
  2. Step 2: Convert to fraction form
    5,640.96/7,779.78 = 4,312.20/x
  3. Step 3: Cross multiply
    5,640.96x = 7,779.78 × 4,312.20
  4. Step 4: Simplify right side
    5,640.96x = 33,547,967.32
  5. Step 5: Solve for x
    x = 33,547,967.32/5,640.96
  6. Step 6: Final answer
    x = 5,947.21

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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.