Home / 7,140.07-9,856.65-4,783.78

Finding the Fourth Proportional to 7,140.07, 9,856.65 and 4,783.78

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Solution

The fourth proportional to 7,140.07, 9,856.65 and 4,783.78 is: 6,603.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.07 : 9,856.65 = 4,783.78 : x
  2. Step 2: Convert to fraction form
    7,140.07/9,856.65 = 4,783.78/x
  3. Step 3: Cross multiply
    7,140.07x = 9,856.65 × 4,783.78
  4. Step 4: Simplify right side
    7,140.07x = 47,152,045.14
  5. Step 5: Solve for x
    x = 47,152,045.14/7,140.07
  6. Step 6: Final answer
    x = 6,603.86

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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.