Home / 8,977.68-12,389.40-4,999.20

Finding the Fourth Proportional to 8,977.68, 12,389.40 and 4,999.20

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Solution

The fourth proportional to 8,977.68, 12,389.40 and 4,999.20 is: 6,899.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.68 : 12,389.40 = 4,999.20 : x
  2. Step 2: Convert to fraction form
    8,977.68/12,389.40 = 4,999.20/x
  3. Step 3: Cross multiply
    8,977.68x = 12,389.40 × 4,999.20
  4. Step 4: Simplify right side
    8,977.68x = 61,937,088.48
  5. Step 5: Solve for x
    x = 61,937,088.48/8,977.68
  6. Step 6: Final answer
    x = 6,899.01

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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.