Home / 7,870.09-10,861.49-5,877.19

Finding the Fourth Proportional to 7,870.09, 10,861.49 and 5,877.19

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Solution

The fourth proportional to 7,870.09, 10,861.49 and 5,877.19 is: 8,111.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.09 : 10,861.49 = 5,877.19 : x
  2. Step 2: Convert to fraction form
    7,870.09/10,861.49 = 5,877.19/x
  3. Step 3: Cross multiply
    7,870.09x = 10,861.49 × 5,877.19
  4. Step 4: Simplify right side
    7,870.09x = 63,835,055.11
  5. Step 5: Solve for x
    x = 63,835,055.11/7,870.09
  6. Step 6: Final answer
    x = 8,111.10

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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.