Home / 12,532.88-18,688.73-12,420.40

Finding the Fourth Proportional to 12,532.88, 18,688.73 and 12,420.40

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Solution

The fourth proportional to 12,532.88, 18,688.73 and 12,420.40 is: 18,521.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,532.88 : 18,688.73 = 12,420.40 : x
  2. Step 2: Convert to fraction form
    12,532.88/18,688.73 = 12,420.40/x
  3. Step 3: Cross multiply
    12,532.88x = 18,688.73 × 12,420.40
  4. Step 4: Simplify right side
    12,532.88x = 232,121,502.09
  5. Step 5: Solve for x
    x = 232,121,502.09/12,532.88
  6. Step 6: Final answer
    x = 18,521.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.