Home / 7,813.90-10,786.70-4,985.08

Finding the Fourth Proportional to 7,813.90, 10,786.70 and 4,985.08

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Solution

The fourth proportional to 7,813.90, 10,786.70 and 4,985.08 is: 6,881.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,813.90 : 10,786.70 = 4,985.08 : x
  2. Step 2: Convert to fraction form
    7,813.90/10,786.70 = 4,985.08/x
  3. Step 3: Cross multiply
    7,813.90x = 10,786.70 × 4,985.08
  4. Step 4: Simplify right side
    7,813.90x = 53,772,547.93
  5. Step 5: Solve for x
    x = 53,772,547.93/7,813.90
  6. Step 6: Final answer
    x = 6,881.65

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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.