Home / 7,815.84-10,785.60-4,670.40

Finding the Fourth Proportional to 7,815.84, 10,785.60 and 4,670.40

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Solution

The fourth proportional to 7,815.84, 10,785.60 and 4,670.40 is: 6,445.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.84 : 10,785.60 = 4,670.40 : x
  2. Step 2: Convert to fraction form
    7,815.84/10,785.60 = 4,670.40/x
  3. Step 3: Cross multiply
    7,815.84x = 10,785.60 × 4,670.40
  4. Step 4: Simplify right side
    7,815.84x = 50,373,066.24
  5. Step 5: Solve for x
    x = 50,373,066.24/7,815.84
  6. Step 6: Final answer
    x = 6,445.00

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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.