Home / 15,412.59-21,269.29-8,700.40

Finding the Fourth Proportional to 15,412.59, 21,269.29 and 8,700.40

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Solution

The fourth proportional to 15,412.59, 21,269.29 and 8,700.40 is: 12,006.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.59 : 21,269.29 = 8,700.40 : x
  2. Step 2: Convert to fraction form
    15,412.59/21,269.29 = 8,700.40/x
  3. Step 3: Cross multiply
    15,412.59x = 21,269.29 × 8,700.40
  4. Step 4: Simplify right side
    15,412.59x = 185,051,255.79
  5. Step 5: Solve for x
    x = 185,051,255.79/15,412.59
  6. Step 6: Final answer
    x = 12,006.50

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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.