Finding the Fourth Proportional to 21,243,153,636, 29,319,389,324.64 and 12,670,129,818.72
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Solution
The fourth proportional to 21,243,153,636, 29,319,389,324.64 and 12,670,129,818.72 is: 17,487,067,848.50
Step by Step Solution
- Step 1: Write the proportion equation
21,243,153,636 : 29,319,389,324.64 = 12,670,129,818.72 : x - Step 2: Convert to fraction form
21,243,153,636/29,319,389,324.64 = 12,670,129,818.72/x - Step 3: Cross multiply
21,243,153,636x = 29,319,389,324.64 × 12,670,129,818.72 - Step 4: Simplify right side
21,243,153,636x = 371,480,468,948,782,088,192 - Step 5: Solve for x
x = 371,480,468,948,782,088,192/21,243,153,636 - Step 6: Final answer
x = 17,487,067,848.50
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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.