Home / 14,478.40-19,980.30-8,190.64

Finding the Fourth Proportional to 14,478.40, 19,980.30 and 8,190.64

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Solution

The fourth proportional to 14,478.40, 19,980.30 and 8,190.64 is: 11,303.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478.40 : 19,980.30 = 8,190.64 : x
  2. Step 2: Convert to fraction form
    14,478.40/19,980.30 = 8,190.64/x
  3. Step 3: Cross multiply
    14,478.40x = 19,980.30 × 8,190.64
  4. Step 4: Simplify right side
    14,478.40x = 163,651,444.39
  5. Step 5: Solve for x
    x = 163,651,444.39/14,478.40
  6. Step 6: Final answer
    x = 11,303.14

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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.