Home / 20,430.96-28,184.13-13,718.93

Finding the Fourth Proportional to 20,430.96, 28,184.13 and 13,718.93

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Solution

The fourth proportional to 20,430.96, 28,184.13 and 13,718.93 is: 18,925.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.96 : 28,184.13 = 13,718.93 : x
  2. Step 2: Convert to fraction form
    20,430.96/28,184.13 = 13,718.93/x
  3. Step 3: Cross multiply
    20,430.96x = 28,184.13 × 13,718.93
  4. Step 4: Simplify right side
    20,430.96x = 386,655,965.66
  5. Step 5: Solve for x
    x = 386,655,965.66/20,430.96
  6. Step 6: Final answer
    x = 18,925.00

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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.