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Finding the Fourth Proportional to 15,018,143.40, 21,073,230.45 and 15,018,143.40

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Solution

The fourth proportional to 15,018,143.40, 21,073,230.45 and 15,018,143.40 is: 21,073,230.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018,143.40 : 21,073,230.45 = 15,018,143.40 : x
  2. Step 2: Convert to fraction form
    15,018,143.40/21,073,230.45 = 15,018,143.40/x
  3. Step 3: Cross multiply
    15,018,143.40x = 21,073,230.45 × 15,018,143.40
  4. Step 4: Simplify right side
    15,018,143.40x = 316,480,796,799,346.50
  5. Step 5: Solve for x
    x = 316,480,796,799,346.50/15,018,143.40
  6. Step 6: Final answer
    x = 21,073,230.45

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.