Home / 12,139.40-16,746.90-10,368.20

Finding the Fourth Proportional to 12,139.40, 16,746.90 and 10,368.20

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Solution

The fourth proportional to 12,139.40, 16,746.90 and 10,368.20 is: 14,303.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.40 : 16,746.90 = 10,368.20 : x
  2. Step 2: Convert to fraction form
    12,139.40/16,746.90 = 10,368.20/x
  3. Step 3: Cross multiply
    12,139.40x = 16,746.90 × 10,368.20
  4. Step 4: Simplify right side
    12,139.40x = 173,635,208.58
  5. Step 5: Solve for x
    x = 173,635,208.58/12,139.40
  6. Step 6: Final answer
    x = 14,303.44

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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.