Home / 15,490.18-21,376.53-9,117.01

Finding the Fourth Proportional to 15,490.18, 21,376.53 and 9,117.01

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Solution

The fourth proportional to 15,490.18, 21,376.53 and 9,117.01 is: 12,581.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.18 : 21,376.53 = 9,117.01 : x
  2. Step 2: Convert to fraction form
    15,490.18/21,376.53 = 9,117.01/x
  3. Step 3: Cross multiply
    15,490.18x = 21,376.53 × 9,117.01
  4. Step 4: Simplify right side
    15,490.18x = 194,889,984.33
  5. Step 5: Solve for x
    x = 194,889,984.33/15,490.18
  6. Step 6: Final answer
    x = 12,581.52

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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.