Home / 10,339.20-14,280.12-6,818.40

Finding the Fourth Proportional to 10,339.20, 14,280.12 and 6,818.40

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Solution

The fourth proportional to 10,339.20, 14,280.12 and 6,818.40 is: 9,417.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,339.20 : 14,280.12 = 6,818.40 : x
  2. Step 2: Convert to fraction form
    10,339.20/14,280.12 = 6,818.40/x
  3. Step 3: Cross multiply
    10,339.20x = 14,280.12 × 6,818.40
  4. Step 4: Simplify right side
    10,339.20x = 97,367,570.21
  5. Step 5: Solve for x
    x = 97,367,570.21/10,339.20
  6. Step 6: Final answer
    x = 9,417.32

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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.