Home / 14,421.20-19,903.20-9,117.36

Finding the Fourth Proportional to 14,421.20, 19,903.20 and 9,117.36

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Solution

The fourth proportional to 14,421.20, 19,903.20 and 9,117.36 is: 12,583.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,421.20 : 19,903.20 = 9,117.36 : x
  2. Step 2: Convert to fraction form
    14,421.20/19,903.20 = 9,117.36/x
  3. Step 3: Cross multiply
    14,421.20x = 19,903.20 × 9,117.36
  4. Step 4: Simplify right side
    14,421.20x = 181,464,639.55
  5. Step 5: Solve for x
    x = 181,464,639.55/14,421.20
  6. Step 6: Final answer
    x = 12,583.19

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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.