Home / 5,681.65-7,840.16-4,190.39

Finding the Fourth Proportional to 5,681.65, 7,840.16 and 4,190.39

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Solution

The fourth proportional to 5,681.65, 7,840.16 and 4,190.39 is: 5,782.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,681.65 : 7,840.16 = 4,190.39 : x
  2. Step 2: Convert to fraction form
    5,681.65/7,840.16 = 4,190.39/x
  3. Step 3: Cross multiply
    5,681.65x = 7,840.16 × 4,190.39
  4. Step 4: Simplify right side
    5,681.65x = 32,853,307.11
  5. Step 5: Solve for x
    x = 32,853,307.11/5,681.65
  6. Step 6: Final answer
    x = 5,782.35

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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.